12520678690 has 32 divisors (see below), whose sum is σ = 24276893760. Its totient is φ = 4621869504.

The previous prime is 12520678673. The next prime is 12520678697. The reversal of 12520678690 is 9687602521.

It is a super-2 number, since 2×12520678690² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12520678690.

It is not an unprimeable number, because it can be changed into a prime (12520678697) 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, 654481 + ... + 673339.

It is an arithmetic number, because the mean of its divisors is an integer number (758652930).

Almost surely, 2^12520678690 is an apocalyptic number.

12520678690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12520678690 is a deficient number, since it is larger than the sum of its proper divisors (11756215070).

12520678690 is a wasteful number, since it uses less digits than its factorization.

12520678690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23986.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 12520678690 in words is "twelve billion, five hundred twenty million, six hundred seventy-eight thousand, six hundred ninety".