1156556140 has 12 divisors (see below), whose sum is σ = 2428767936. Its totient is φ = 462622448.

The previous prime is 1156556117. The next prime is 1156556171. The reversal of 1156556140 is 416556511.

It is a junction number, because it is equal to n+sod(n) for n = 1156556096 and 1156556105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28913884 + ... + 28913923.

It is an arithmetic number, because the mean of its divisors is an integer number (202397328).

Almost surely, 2^1156556140 is an apocalyptic number.

1156556140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156556140 is an abundant number, since it is smaller than the sum of its proper divisors (1272211796).

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

1156556140 is a wasteful number, since it uses less digits than its factorization.

1156556140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57827816 (or 57827814 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 1156556140 is about 34008.1775459962. The cubic root of 1156556140 is about 1049.6767379785.

The spelling of 1156556140 in words is "one billion, one hundred fifty-six million, five hundred fifty-six thousand, one hundred forty".