72718451 has 4 divisors (see below), whose sum is σ = 78312192. Its totient is φ = 67124712.

The previous prime is 72718441. The next prime is 72718463. The reversal of 72718451 is 15481727.

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 72718451 - 2¹⁴ = 72702067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72718411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2796851 + ... + 2796876.

It is an arithmetic number, because the mean of its divisors is an integer number (19578048).

Almost surely, 2^72718451 is an apocalyptic number.

72718451 is a deficient number, since it is larger than the sum of its proper divisors (5593741).

72718451 is a wasteful number, since it uses less digits than its factorization.

72718451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5593740.

The product of its digits is 15680, while the sum is 35.

The square root of 72718451 is about 8527.5114189311. The cubic root of 72718451 is about 417.3959265851.

The spelling of 72718451 in words is "seventy-two million, seven hundred eighteen thousand, four hundred fifty-one".