72495440639 has 8 divisors (see below), whose sum is σ = 74267154528. Its totient is φ = 70723895040.

The previous prime is 72495440629. The next prime is 72495440653. The reversal of 72495440639 is 93604459427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72495440639 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 (72495440629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1685054 + ... + 1727540.

It is an arithmetic number, because the mean of its divisors is an integer number (9283394316).

Almost surely, 2^72495440639 is an apocalyptic number.

72495440639 is a deficient number, since it is larger than the sum of its proper divisors (1771713889).

72495440639 is a wasteful number, since it uses less digits than its factorization.

72495440639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84145.

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 72495440639 in words is "seventy-two billion, four hundred ninety-five million, four hundred forty thousand, six hundred thirty-nine".