72915300581 has 4 divisors (see below), whose sum is σ = 76752948000. Its totient is φ = 69077653164.

The previous prime is 72915300541. The next prime is 72915300589. The reversal of 72915300581 is 18500351927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-72915300581 is a prime.

It is a super-2 number, since 2×72915300581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72915300589) 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, 1918823681 + ... + 1918823718.

It is an arithmetic number, because the mean of its divisors is an integer number (19188237000).

Almost surely, 2^72915300581 is an apocalyptic number.

It is an amenable number.

72915300581 is a deficient number, since it is larger than the sum of its proper divisors (3837647419).

72915300581 is a wasteful number, since it uses less digits than its factorization.

72915300581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837647418.

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 72915300581 in words is "seventy-two billion, nine hundred fifteen million, three hundred thousand, five hundred eighty-one".