72351765 has 16 divisors (see below), whose sum is σ = 128625600. Its totient is φ = 38587536.

The previous prime is 72351733. The next prime is 72351787. The reversal of 72351765 is 56715327.

It is not a de Polignac number, because 72351765 - 2⁵ = 72351733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267835 + ... + 268104.

It is an arithmetic number, because the mean of its divisors is an integer number (8039100).

Almost surely, 2^72351765 is an apocalyptic number.

It is an amenable number.

72351765 is a deficient number, since it is larger than the sum of its proper divisors (56273835).

72351765 is a wasteful number, since it uses less digits than its factorization.

72351765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535953 (or 535947 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 72351765 is about 8505.9840700533. The cubic root of 72351765 is about 416.6931648926.

The spelling of 72351765 in words is "seventy-two million, three hundred fifty-one thousand, seven hundred sixty-five".