72864290330639 has 4 divisors (see below), whose sum is σ = 76699252979640. Its totient is φ = 69029327681640.

The previous prime is 72864290330561. The next prime is 72864290330653. The reversal of 72864290330639 is 93603309246827.

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

It is not a de Polignac number, because 72864290330639 - 2⁴⁰ = 71764778702863 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 (72864290330339) 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, 1917481324472 + ... + 1917481324509.

It is an arithmetic number, because the mean of its divisors is an integer number (19174813244910).

Almost surely, 2^{72864290330639} is an apocalyptic number.

72864290330639 is a deficient number, since it is larger than the sum of its proper divisors (3834962649001).

72864290330639 is a wasteful number, since it uses less digits than its factorization.

72864290330639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834962649000.

The product of its (nonzero) digits is 70543872, while the sum is 62.

The spelling of 72864290330639 in words is "seventy-two trillion, eight hundred sixty-four billion, two hundred ninety million, three hundred thirty thousand, six hundred thirty-nine".