71964445680 has 160 divisors (see below), whose sum is σ = 253642456320. Its totient is φ = 18744203520.

The previous prime is 71964445667. The next prime is 71964445687. The reversal of 71964445680 is 8654446917.

71964445680 is a `hidden beast` number, since 7 + 19 + 64 + 4 + 4 + 568 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71964445687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294526 + ... + 480285.

It is an arithmetic number, because the mean of its divisors is an integer number (1585265352).

Almost surely, 2^71964445680 is an apocalyptic number.

It is an amenable number.

71964445680 is an abundant number, since it is smaller than the sum of its proper divisors (181678010640).

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

71964445680 is a wasteful number, since it uses less digits than its factorization.

71964445680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774876 (or 774864 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 71964445680 in words is "seventy-one billion, nine hundred sixty-four million, four hundred forty-five thousand, six hundred eighty".