72125666516 has 24 divisors (see below), whose sum is σ = 128587465440. Its totient is φ = 35388564512.

The previous prime is 72125666507. The next prime is 72125666527. The reversal of 72125666516 is 61566652127.

It is a super-2 number, since 2×72125666516² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138551 + ... + 404286.

It is an arithmetic number, because the mean of its divisors is an integer number (5357811060).

Almost surely, 2^72125666516 is an apocalyptic number.

It is an amenable number.

72125666516 is a deficient number, since it is larger than the sum of its proper divisors (56461798924).

72125666516 is a wasteful number, since it uses less digits than its factorization.

72125666516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543463 (or 543461 counting only the distinct ones).

The product of its digits is 907200, while the sum is 47.

The spelling of 72125666516 in words is "seventy-two billion, one hundred twenty-five million, six hundred sixty-six thousand, five hundred sixteen".