72165556048 has 10 divisors (see below), whose sum is σ = 139820764874. Its totient is φ = 36082778016.

The previous prime is 72165556039. The next prime is 72165556051. The reversal of 72165556048 is 84065556127.

It can be written as a sum of positive squares in only one way, i.e., 68807585344 + 3357970704 = 262312^2 + 57948^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72165555992 and 72165556010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2255173611 + ... + 2255173642.

Almost surely, 2^72165556048 is an apocalyptic number.

It is an amenable number.

72165556048 is a deficient number, since it is larger than the sum of its proper divisors (67655208826).

72165556048 is a wasteful number, since it uses less digits than its factorization.

72165556048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510347261 (or 4510347255 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 49.

The spelling of 72165556048 in words is "seventy-two billion, one hundred sixty-five million, five hundred fifty-six thousand, forty-eight".