72310864649 has 4 divisors (see below), whose sum is σ = 72880241664. Its totient is φ = 71741487636.

The previous prime is 72310864631. The next prime is 72310864663. The reversal of 72310864649 is 94646801327.

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 cyclic number.

It is not a de Polignac number, because 72310864649 - 2³² = 68015897353 is a prime.

It is a super-2 number, since 2×72310864649² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72310864597 and 72310864606.

It is not an unprimeable number, because it can be changed into a prime (72310864609) 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, 284688317 + ... + 284688570.

It is an arithmetic number, because the mean of its divisors is an integer number (18220060416).

Almost surely, 2^72310864649 is an apocalyptic number.

It is an amenable number.

72310864649 is a deficient number, since it is larger than the sum of its proper divisors (569377015).

72310864649 is a wasteful number, since it uses less digits than its factorization.

72310864649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569377014.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 72310864649 in words is "seventy-two billion, three hundred ten million, eight hundred sixty-four thousand, six hundred forty-nine".