12621757040 has 20 divisors (see below), whose sum is σ = 29345585304. Its totient is φ = 5048702784.

The previous prime is 12621757037. The next prime is 12621757051. The reversal of 12621757040 is 4075712621.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78885902 + ... + 78886061.

Almost surely, 2^12621757040 is an apocalyptic number.

12621757040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12621757040 is an abundant number, since it is smaller than the sum of its proper divisors (16723828264).

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

12621757040 is a wasteful number, since it uses less digits than its factorization.

12621757040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157771976 (or 157771970 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 12621757040 in words is "twelve billion, six hundred twenty-one million, seven hundred fifty-seven thousand, forty".