13121434984638 has 16 divisors (see below), whose sum is σ = 26351761548816. Its totient is φ = 4355663064960.

The previous prime is 13121434984547. The next prime is 13121434984639. The reversal of 13121434984638 is 83648943412131.

It is a super-3 number, since 3×13121434984638³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121434984639) 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, 4537147581 + ... + 4537150472.

It is an arithmetic number, because the mean of its divisors is an integer number (1646985096801).

Almost surely, 2^{13121434984638} is an apocalyptic number.

13121434984638 is an abundant number, since it is smaller than the sum of its proper divisors (13230326564178).

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

13121434984638 is a wasteful number, since it uses less digits than its factorization.

13121434984638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9074298299.

The product of its digits is 11943936, while the sum is 57.

The spelling of 13121434984638 in words is "thirteen trillion, one hundred twenty-one billion, four hundred thirty-four million, nine hundred eighty-four thousand, six hundred thirty-eight".