1156139064 has 24 divisors (see below), whose sum is σ = 3131210160. Its totient is φ = 385379664.

The previous prime is 1156139057. The next prime is 1156139071. The reversal of 1156139064 is 4609316511.

1156139064 is a `hidden beast` number, since 1 + 1 + 561 + 3 + 90 + 6 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1156139057) and next prime (1156139071).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8028672 + ... + 8028815.

It is an arithmetic number, because the mean of its divisors is an integer number (130467090).

Almost surely, 2^1156139064 is an apocalyptic number.

It is an amenable number.

1156139064 is an abundant number, since it is smaller than the sum of its proper divisors (1975071096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1156139064 is a wasteful number, since it uses less digits than its factorization.

1156139064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16057499 (or 16057492 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1156139064 is about 34002.0449973233. The cubic root of 1156139064 is about 1049.5505450522.

It can be divided in two parts, 11561 and 39064, that added together give a 4-th power (50625 = 15⁴).

The spelling of 1156139064 in words is "one billion, one hundred fifty-six million, one hundred thirty-nine thousand, sixty-four".