68372515644 has 12 divisors (see below), whose sum is σ = 159535869864. Its totient is φ = 22790838544.

The previous prime is 68372515643. The next prime is 68372515661. The reversal of 68372515644 is 44651527386.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68372515643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2848854807 + ... + 2848854830.

It is an arithmetic number, because the mean of its divisors is an integer number (13294655822).

Almost surely, 2^68372515644 is an apocalyptic number.

It is an amenable number.

68372515644 is an abundant number, since it is smaller than the sum of its proper divisors (91163354220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68372515644 is a wasteful number, since it uses less digits than its factorization.

68372515644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5697709644 (or 5697709642 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 51.

The spelling of 68372515644 in words is "sixty-eight billion, three hundred seventy-two million, five hundred fifteen thousand, six hundred forty-four".