72642767501 has 4 divisors (see below), whose sum is σ = 73833632604. Its totient is φ = 71451902400.

The previous prime is 72642767489. The next prime is 72642767539. The reversal of 72642767501 is 10576724627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23662438276 + 48980329225 = 153826^2 + 221315^2 .

It is a cyclic number.

It is not a de Polignac number, because 72642767501 - 2¹⁰ = 72642766477 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 (72642760501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 595432460 + ... + 595432581.

It is an arithmetic number, because the mean of its divisors is an integer number (18458408151).

Almost surely, 2^72642767501 is an apocalyptic number.

It is an amenable number.

72642767501 is a deficient number, since it is larger than the sum of its proper divisors (1190865103).

72642767501 is a wasteful number, since it uses less digits than its factorization.

72642767501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190865102.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 72642767501 in words is "seventy-two billion, six hundred forty-two million, seven hundred sixty-seven thousand, five hundred one".