620577929421 has 12 divisors (see below), whose sum is σ = 897838477120. Its totient is φ = 413050249800.

The previous prime is 620577929399. The next prime is 620577929429. The reversal of 620577929421 is 124929775026.

620577929421 is a `hidden beast` number, since 6 + 2 + 0 + 577 + 9 + 29 + 42 + 1 = 666.

It is not a de Polignac number, because 620577929421 - 2¹⁷ = 620577798349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620577929429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55691605 + ... + 55702746.

Almost surely, 2^620577929421 is an apocalyptic number.

It is an amenable number.

620577929421 is a deficient number, since it is larger than the sum of its proper divisors (277260547699).

620577929421 is a wasteful number, since it uses less digits than its factorization.

620577929421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111394976 (or 111394973 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 620577929421 in words is "six hundred twenty billion, five hundred seventy-seven million, nine hundred twenty-nine thousand, four hundred twenty-one".