64621402136 has 16 divisors (see below), whose sum is σ = 121774002000. Its totient is φ = 32148334944.

The previous prime is 64621402127. The next prime is 64621402187. The reversal of 64621402136 is 63120412646.

It is a super-2 number, since 2×64621402136² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64621402096 and 64621402105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20294075 + ... + 20297258.

It is an arithmetic number, because the mean of its divisors is an integer number (7610875125).

Almost surely, 2^64621402136 is an apocalyptic number.

It is an amenable number.

64621402136 is a deficient number, since it is larger than the sum of its proper divisors (57152599864).

64621402136 is a wasteful number, since it uses less digits than its factorization.

64621402136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40591538 (or 40591534 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 64621402136 in words is "sixty-four billion, six hundred twenty-one million, four hundred two thousand, one hundred thirty-six".