12087978612 has 24 divisors (see below), whose sum is σ = 28216118112. Its totient is φ = 4027778400.

The previous prime is 12087978611. The next prime is 12087978613. The reversal of 12087978612 is 21687978021.

It is an interprime number because it is at equal distance from previous prime (12087978611) and next prime (12087978613).

It is a super-2 number, since 2×12087978612² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12087978611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160714 + ... + 223617.

It is an arithmetic number, because the mean of its divisors is an integer number (1175671588).

Almost surely, 2^12087978612 is an apocalyptic number.

12087978612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12087978612 is an abundant number, since it is smaller than the sum of its proper divisors (16128139500).

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

12087978612 is a wasteful number, since it uses less digits than its factorization.

12087978612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386959 (or 386957 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 51.

The spelling of 12087978612 in words is "twelve billion, eighty-seven million, nine hundred seventy-eight thousand, six hundred twelve".