64616467838 has 32 divisors (see below), whose sum is σ = 106125707520. Its totient is φ = 29324655360.

The previous prime is 64616467801. The next prime is 64616467847. The reversal of 64616467838 is 83876461646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8063978 + ... + 8071986.

It is an arithmetic number, because the mean of its divisors is an integer number (3316428360).

Almost surely, 2^64616467838 is an apocalyptic number.

64616467838 is a deficient number, since it is larger than the sum of its proper divisors (41509239682).

64616467838 is a wasteful number, since it uses less digits than its factorization.

64616467838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13172.

The product of its digits is 27869184, while the sum is 59.

The spelling of 64616467838 in words is "sixty-four billion, six hundred sixteen million, four hundred sixty-seven thousand, eight hundred thirty-eight".