1156155012 has 48 divisors (see below), whose sum is σ = 2999808000. Its totient is φ = 385080480.

The previous prime is 1156155001. The next prime is 1156155017. The reversal of 1156155012 is 2105516511.

1156155012 is a `hidden beast` number, since 1 + 156 + 1 + 5 + 501 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1156155017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163837 + ... + 170747.

It is an arithmetic number, because the mean of its divisors is an integer number (62496000).

Almost surely, 2^1156155012 is an apocalyptic number.

1156155012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1156155012 is an abundant number, since it is smaller than the sum of its proper divisors (1843652988).

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

1156155012 is a wasteful number, since it uses less digits than its factorization.

1156155012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8473 (or 8465 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The square root of 1156155012 is about 34002.2795118210. The cubic root of 1156155012 is about 1049.5553709293. Note that the first 3 decimals are identical.

The spelling of 1156155012 in words is "one billion, one hundred fifty-six million, one hundred fifty-five thousand, twelve".