1153778516 has 24 divisors (see below), whose sum is σ = 2222885280. Its totient is φ = 519631200.

The previous prime is 1153778503. The next prime is 1153778519. The reversal of 1153778516 is 6158773511.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153778519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115490 + ... + 125081.

It is an arithmetic number, because the mean of its divisors is an integer number (92620220).

Almost surely, 2^1153778516 is an apocalyptic number.

It is an amenable number.

1153778516 is a deficient number, since it is larger than the sum of its proper divisors (1069106764).

1153778516 is a wasteful number, since it uses less digits than its factorization.

1153778516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240695 (or 240693 counting only the distinct ones).

The product of its digits is 176400, while the sum is 44.

The square root of 1153778516 is about 33967.3154076091. The cubic root of 1153778516 is about 1048.8357514233.

The spelling of 1153778516 in words is "one billion, one hundred fifty-three million, seven hundred seventy-eight thousand, five hundred sixteen".