64747102172 has 6 divisors (see below), whose sum is σ = 113307428808. Its totient is φ = 32373551084.

The previous prime is 64747102171. The next prime is 64747102183. The reversal of 64747102172 is 27120174746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64747102171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8093387768 + ... + 8093387775.

It is an arithmetic number, because the mean of its divisors is an integer number (18884571468).

Almost surely, 2^64747102172 is an apocalyptic number.

It is an amenable number.

64747102172 is a deficient number, since it is larger than the sum of its proper divisors (48560326636).

64747102172 is a wasteful number, since it uses less digits than its factorization.

64747102172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16186775547 (or 16186775545 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 41.

The spelling of 64747102172 in words is "sixty-four billion, seven hundred forty-seven million, one hundred two thousand, one hundred seventy-two".