72734558642 has 8 divisors (see below), whose sum is σ = 109105099500. Its totient is φ = 36366192144.

The previous prime is 72734558621. The next prime is 72734558653. The reversal of 72734558642 is 24685543727.

It can be written as a sum of positive squares in 2 ways, for example, as 72695483641 + 39075001 = 269621^2 + 6251^2 .

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

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, 457217 + ... + 595412.

Almost surely, 2^72734558642 is an apocalyptic number.

72734558642 is a deficient number, since it is larger than the sum of its proper divisors (36370540858).

72734558642 is a wasteful number, since it uses less digits than its factorization.

72734558642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087180.

The product of its digits is 11289600, while the sum is 53.

The spelling of 72734558642 in words is "seventy-two billion, seven hundred thirty-four million, five hundred fifty-eight thousand, six hundred forty-two".