72979552550 has 24 divisors (see below), whose sum is σ = 135878210976. Its totient is φ = 29162521440.

The previous prime is 72979552549. The next prime is 72979552561. The reversal of 72979552550 is 5525597927.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 682142 + ... + 781841.

It is an arithmetic number, because the mean of its divisors is an integer number (5661592124).

Almost surely, 2^72979552550 is an apocalyptic number.

72979552550 is a deficient number, since it is larger than the sum of its proper divisors (62898658426).

72979552550 is a wasteful number, since it uses less digits than its factorization.

72979552550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464992 (or 1464987 counting only the distinct ones).

The product of its (nonzero) digits is 9922500, while the sum is 56.

The spelling of 72979552550 in words is "seventy-two billion, nine hundred seventy-nine million, five hundred fifty-two thousand, five hundred fifty".