72317256442 has 8 divisors (see below), whose sum is σ = 112216432500. Its totient is φ = 34911778944.

The previous prime is 72317256421. The next prime is 72317256481. The reversal of 72317256442 is 24465271327.

It can be written as a sum of positive squares in 2 ways, for example, as 68424619561 + 3892636881 = 261581^2 + 62391^2 .

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

It is a super-3 number, since 3×72317256442³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623424567 + ... + 623424682.

Almost surely, 2^72317256442 is an apocalyptic number.

72317256442 is a deficient number, since it is larger than the sum of its proper divisors (39899176058).

72317256442 is a wasteful number, since it uses less digits than its factorization.

72317256442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246849280.

The product of its digits is 564480, while the sum is 43.

The spelling of 72317256442 in words is "seventy-two billion, three hundred seventeen million, two hundred fifty-six thousand, four hundred forty-two".