1156455816 has 16 divisors (see below), whose sum is σ = 2891139600. Its totient is φ = 385485264.

The previous prime is 1156455779. The next prime is 1156455827. The reversal of 1156455816 is 6185546511.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24092806 + ... + 24092853.

It is an arithmetic number, because the mean of its divisors is an integer number (180696225).

Almost surely, 2^1156455816 is an apocalyptic number.

It is an amenable number.

1156455816 is an abundant number, since it is smaller than the sum of its proper divisors (1734683784).

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

1156455816 is a wasteful number, since it uses less digits than its factorization.

1156455816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48185668 (or 48185664 counting only the distinct ones).

The product of its digits is 144000, while the sum is 42.

The square root of 1156455816 is about 34006.7025158277. The cubic root of 1156455816 is about 1049.6463861404.

The spelling of 1156455816 in words is "one billion, one hundred fifty-six million, four hundred fifty-five thousand, eight hundred sixteen".