72776451 has 16 divisors (see below), whose sum is σ = 106007040. Its totient is φ = 44044320.

The previous prime is 72776443. The next prime is 72776453. The reversal of 72776451 is 15467727.

It is not a de Polignac number, because 72776451 - 2³ = 72776443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72776453) 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 15 ways as a sum of consecutive naturals, for example, 34246 + ... + 36308.

It is an arithmetic number, because the mean of its divisors is an integer number (6625440).

Almost surely, 2^72776451 is an apocalyptic number.

72776451 is a deficient number, since it is larger than the sum of its proper divisors (33230589).

72776451 is a wasteful number, since it uses less digits than its factorization.

72776451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3146.

The product of its digits is 82320, while the sum is 39.

The square root of 72776451 is about 8530.9114987790. The cubic root of 72776451 is about 417.5068683059.

The spelling of 72776451 in words is "seventy-two million, seven hundred seventy-six thousand, four hundred fifty-one".