12157037985 has 16 divisors (see below), whose sum is σ = 19640110464. Its totient is φ = 6420803712.

The previous prime is 12157037983. The next prime is 12157037989. The reversal of 12157037985 is 58973075121.

It is not a de Polignac number, because 12157037985 - 2¹ = 12157037983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12157037983) 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, 3932772 + ... + 3935861.

It is an arithmetic number, because the mean of its divisors is an integer number (1227506904).

Almost surely, 2^12157037985 is an apocalyptic number.

12157037985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12157037985 is a deficient number, since it is larger than the sum of its proper divisors (7483072479).

12157037985 is a wasteful number, since it uses less digits than its factorization.

12157037985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7868744.

The product of its (nonzero) digits is 529200, while the sum is 48.

The spelling of 12157037985 in words is "twelve billion, one hundred fifty-seven million, thirty-seven thousand, nine hundred eighty-five".