64621402137 has 12 divisors (see below), whose sum is σ = 93396986800. Its totient is φ = 43055567928.

The previous prime is 64621402127. The next prime is 64621402187. The reversal of 64621402137 is 73120412646.

64621402137 is a `hidden beast` number, since 6 + 4 + 621 + 4 + 0 + 21 + 3 + 7 = 666.

64621402137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64621402137 - 2¹⁴ = 64621385753 is a prime.

It is a super-2 number, since 2×64621402137² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64621402127) 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, 2097763 + ... + 2128344.

Almost surely, 2^64621402137 is an apocalyptic number.

It is an amenable number.

64621402137 is a deficient number, since it is larger than the sum of its proper divisors (28775584663).

64621402137 is a wasteful number, since it uses less digits than its factorization.

64621402137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227812 (or 4227809 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 64621402137 in words is "sixty-four billion, six hundred twenty-one million, four hundred two thousand, one hundred thirty-seven".