13402469752521 has 16 divisors (see below), whose sum is σ = 18155631138624. Its totient is φ = 8792981848064.

The previous prime is 13402469752517. The next prime is 13402469752561. The reversal of 13402469752521 is 12525796420431.

It is not a de Polignac number, because 13402469752521 - 2² = 13402469752517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13402469752561) 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, 104654256 + ... + 104782241.

It is an arithmetic number, because the mean of its divisors is an integer number (1134726946164).

Almost surely, 2^{13402469752521} is an apocalyptic number.

It is an amenable number.

13402469752521 is a deficient number, since it is larger than the sum of its proper divisors (4753161386103).

13402469752521 is a wasteful number, since it uses less digits than its factorization.

13402469752521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209436840.

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 13402469752521 in words is "thirteen trillion, four hundred two billion, four hundred sixty-nine million, seven hundred fifty-two thousand, five hundred twenty-one".