72407072637525 has 96 divisors (see below), whose sum is σ = 122787807442432. Its totient is φ = 37629607276800.

The previous prime is 72407072637503. The next prime is 72407072637527. The reversal of 72407072637525 is 52573627070427.

It is a happy number.

It is not a de Polignac number, because 72407072637525 - 2¹¹ = 72407072635477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72407072637527) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2502562959 + ... + 2502591891.

Almost surely, 2^{72407072637525} is an apocalyptic number.

72407072637525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72407072637525 is a deficient number, since it is larger than the sum of its proper divisors (50380734804907).

72407072637525 is a wasteful number, since it uses less digits than its factorization.

72407072637525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30803 (or 30798 counting only the distinct ones).

The product of its (nonzero) digits is 34574400, while the sum is 57.

The spelling of 72407072637525 in words is "seventy-two trillion, four hundred seven billion, seventy-two million, six hundred thirty-seven thousand, five hundred twenty-five".