137604998421 has 40 divisors (see below), whose sum is σ = 224298373728. Its totient is φ = 83377188000.

The previous prime is 137604998413. The next prime is 137604998429. The reversal of 137604998421 is 124899406731.

137604998421 is a `hidden beast` number, since 1 + 3 + 7 + 604 + 9 + 9 + 8 + 4 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (137604998413) and next prime (137604998429).

It is not a de Polignac number, because 137604998421 - 2³ = 137604998413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137604998429) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4315266 + ... + 4347036.

Almost surely, 2^137604998421 is an apocalyptic number.

137604998421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

137604998421 is a deficient number, since it is larger than the sum of its proper divisors (86693375307).

137604998421 is a wasteful number, since it uses less digits than its factorization.

137604998421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36655 (or 36646 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 137604998421 in words is "one hundred thirty-seven billion, six hundred four million, nine hundred ninety-eight thousand, four hundred twenty-one".