72318561494 has 8 divisors (see below), whose sum is σ = 108482162808. Its totient is φ = 36157840560.

The previous prime is 72318561487. The next prime is 72318561569. The reversal of 72318561494 is 49416581327.

It is a happy number.

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

It is a super-2 number, since 2×72318561494² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656192 + ... + 758435.

It is an arithmetic number, because the mean of its divisors is an integer number (13560270351).

Almost surely, 2^72318561494 is an apocalyptic number.

72318561494 is a deficient number, since it is larger than the sum of its proper divisors (36163601314).

72318561494 is a wasteful number, since it uses less digits than its factorization.

72318561494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440190.

The product of its digits is 1451520, while the sum is 50.

The spelling of 72318561494 in words is "seventy-two billion, three hundred eighteen million, five hundred sixty-one thousand, four hundred ninety-four".