12621615240 has 128 divisors (see below), whose sum is σ = 42550583040. Its totient is φ = 2971769856.

The previous prime is 12621615233. The next prime is 12621615271. The reversal of 12621615240 is 4251612621.

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

It is a junction number, because it is equal to n+sod(n) for n = 12621615198 and 12621615207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140007 + ... + 211766.

It is an arithmetic number, because the mean of its divisors is an integer number (332426430).

Almost surely, 2^12621615240 is an apocalyptic number.

12621615240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12621615240 is an abundant number, since it is smaller than the sum of its proper divisors (29928967800).

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

12621615240 is a wasteful number, since it uses less digits than its factorization.

12621615240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351823 (or 351819 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 12621615240 in words is "twelve billion, six hundred twenty-one million, six hundred fifteen thousand, two hundred forty".