61159140 has 72 divisors (see below), whose sum is σ = 212022720. Its totient is φ = 13978944.

The previous prime is 61159121. The next prime is 61159169. The reversal of 61159140 is 4195116.

61159140 is a `hidden beast` number, since 611 + 5 + 9 + 1 + 40 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23010 + ... + 25529.

It is an arithmetic number, because the mean of its divisors is an integer number (2944760).

Almost surely, 2^61159140 is an apocalyptic number.

61159140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61159140 is an abundant number, since it is smaller than the sum of its proper divisors (150863580).

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

61159140 is a wasteful number, since it uses less digits than its factorization.

61159140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48561 (or 48556 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 61159140 is about 7820.4309344179. The cubic root of 61159140 is about 393.9917457279.

It can be divided in two parts, 61 and 159140, that added together give a square (159201 = 399²).

The spelling of 61159140 in words is "sixty-one million, one hundred fifty-nine thousand, one hundred forty".