72684077956 has 36 divisors (see below), whose sum is σ = 150208774464. Its totient is φ = 30145458960.

The previous prime is 72684077951. The next prime is 72684078011. The reversal of 72684077956 is 65977048627.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 72684077894 and 72684077903.

It is not an unprimeable number, because it can be changed into a prime (72684077951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1323696 + ... + 1377511.

Almost surely, 2^72684077956 is an apocalyptic number.

It is an amenable number.

72684077956 is an abundant number, since it is smaller than the sum of its proper divisors (77524696508).

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

72684077956 is a wasteful number, since it uses less digits than its factorization.

72684077956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701280 (or 2701247 counting only the distinct ones).

The product of its (nonzero) digits is 35562240, while the sum is 61.

The spelling of 72684077956 in words is "seventy-two billion, six hundred eighty-four million, seventy-seven thousand, nine hundred fifty-six".