620564061631 has 8 divisors (see below), whose sum is σ = 633819573504. Its totient is φ = 607310717400.

The previous prime is 620564061521. The next prime is 620564061641. The reversal of 620564061631 is 136160465026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620564061631 is a prime.

It is a super-2 number, since 2×620564061631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620564061641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43456 + ... + 1114906.

It is an arithmetic number, because the mean of its divisors is an integer number (79227446688).

Almost surely, 2^620564061631 is an apocalyptic number.

620564061631 is a deficient number, since it is larger than the sum of its proper divisors (13255511873).

620564061631 is a wasteful number, since it uses less digits than its factorization.

620564061631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083821.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 620564061631 in words is "six hundred twenty billion, five hundred sixty-four million, sixty-one thousand, six hundred thirty-one".