72123011575 has 12 divisors (see below), whose sum is σ = 90948341880. Its totient is φ = 56720468960.

The previous prime is 72123011533. The next prime is 72123011603. The reversal of 72123011575 is 57511032127.

It is not a de Polignac number, because 72123011575 - 2⁷ = 72123011447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72123011575.

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, 24447004 + ... + 24449953.

It is an arithmetic number, because the mean of its divisors is an integer number (7579028490).

Almost surely, 2^72123011575 is an apocalyptic number.

72123011575 is a deficient number, since it is larger than the sum of its proper divisors (18825330305).

72123011575 is a wasteful number, since it uses less digits than its factorization.

72123011575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48897026 (or 48897021 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 34.

The spelling of 72123011575 in words is "seventy-two billion, one hundred twenty-three million, eleven thousand, five hundred seventy-five".