1156161810 has 32 divisors (see below), whose sum is σ = 2781257472. Its totient is φ = 307591040.

The previous prime is 1156161803. The next prime is 1156161859. The reversal of 1156161810 is 181616511.

It is a super-2 number, since 2×1156161810² = 2673420261804952200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31779 + ... + 57638.

It is an arithmetic number, because the mean of its divisors is an integer number (86914296).

Almost surely, 2^1156161810 is an apocalyptic number.

1156161810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1156161810 is an abundant number, since it is smaller than the sum of its proper divisors (1625095662).

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

1156161810 is a wasteful number, since it uses less digits than its factorization.

1156161810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89858.

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 1156161810 is about 34002.3794755602. The cubic root of 1156161810 is about 1049.5574279958.

The spelling of 1156161810 in words is "one billion, one hundred fifty-six million, one hundred sixty-one thousand, eight hundred ten".