72685481456 has 40 divisors (see below), whose sum is σ = 160980634080. Its totient is φ = 31144299264.

The previous prime is 72685481423. The next prime is 72685481507. The reversal of 72685481456 is 65418458627.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479690 + ... + 612758.

It is an arithmetic number, because the mean of its divisors is an integer number (4024515852).

Almost surely, 2^72685481456 is an apocalyptic number.

It is an amenable number.

72685481456 is an abundant number, since it is smaller than the sum of its proper divisors (88295152624).

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

72685481456 is a wasteful number, since it uses less digits than its factorization.

72685481456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137961 (or 137955 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 56.

The spelling of 72685481456 in words is "seventy-two billion, six hundred eighty-five million, four hundred eighty-one thousand, four hundred fifty-six".