72123915575 has 12 divisors (see below), whose sum is σ = 90025935888. Its totient is φ = 57317016000.

The previous prime is 72123915557. The next prime is 72123915593. The reversal of 72123915575 is 57551932127.

It is an interprime number because it is at equal distance from previous prime (72123915557) and next prime (72123915593).

It is not a de Polignac number, because 72123915575 - 2⁶ = 72123915511 is a prime.

It is a Duffinian 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, 9549062 + ... + 9556611.

It is an arithmetic number, because the mean of its divisors is an integer number (7502161324).

Almost surely, 2^72123915575 is an apocalyptic number.

72123915575 is a deficient number, since it is larger than the sum of its proper divisors (17902020313).

72123915575 is a wasteful number, since it uses less digits than its factorization.

72123915575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19105834 (or 19105829 counting only the distinct ones).

The product of its digits is 661500, while the sum is 47.

The spelling of 72123915575 in words is "seventy-two billion, one hundred twenty-three million, nine hundred fifteen thousand, five hundred seventy-five".