72994179551 has 4 divisors (see below), whose sum is σ = 73150484472. Its totient is φ = 72837874632.

The previous prime is 72994179547. The next prime is 72994179631. The reversal of 72994179551 is 15597149927.

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

It is a cyclic number.

It is not a de Polignac number, because 72994179551 - 2² = 72994179547 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 (72994179521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78151760 + ... + 78152693.

It is an arithmetic number, because the mean of its divisors is an integer number (18287621118).

Almost surely, 2^72994179551 is an apocalyptic number.

72994179551 is a deficient number, since it is larger than the sum of its proper divisors (156304921).

72994179551 is a wasteful number, since it uses less digits than its factorization.

72994179551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156304920.

The product of its digits is 7144200, while the sum is 59.

The spelling of 72994179551 in words is "seventy-two billion, nine hundred ninety-four million, one hundred seventy-nine thousand, five hundred fifty-one".