72160521550 has 48 divisors (see below), whose sum is σ = 144583246080. Its totient is φ = 26636480640.

The previous prime is 72160521527. The next prime is 72160521551. The reversal of 72160521550 is 5512506127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72160521551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2690004 + ... + 2716696.

It is an arithmetic number, because the mean of its divisors is an integer number (3012150960).

Almost surely, 2^72160521550 is an apocalyptic number.

72160521550 is an abundant number, since it is smaller than the sum of its proper divisors (72422724530).

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

72160521550 is a wasteful number, since it uses less digits than its factorization.

72160521550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30877 (or 30872 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The spelling of 72160521550 in words is "seventy-two billion, one hundred sixty million, five hundred twenty-one thousand, five hundred fifty".