72464645 has 16 divisors (see below), whose sum is σ = 96422400. Its totient is φ = 51835200.

The previous prime is 72464641. The next prime is 72464657. The reversal of 72464645 is 54646427.

It is not a de Polignac number, because 72464645 - 2² = 72464641 is a prime.

It is a super-2 number, since 2×72464645² = 10502249549952050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72464599 and 72464608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72464641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7445 + ... + 14154.

It is an arithmetic number, because the mean of its divisors is an integer number (6026400).

Almost surely, 2^72464645 is an apocalyptic number.

It is an amenable number.

72464645 is a deficient number, since it is larger than the sum of its proper divisors (23957755).

72464645 is a wasteful number, since it uses less digits than its factorization.

72464645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21676.

The product of its digits is 161280, while the sum is 38.

The square root of 72464645 is about 8512.6168127081. The cubic root of 72464645 is about 416.9097543303.

The spelling of 72464645 in words is "seventy-two million, four hundred sixty-four thousand, six hundred forty-five".