72326553 has 8 divisors (see below), whose sum is σ = 103853568. Its totient is φ = 44508624.

The previous prime is 72326539. The next prime is 72326563. The reversal of 72326553 is 35562327.

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

It is not a de Polignac number, because 72326553 - 2²² = 68132249 is a prime.

It is a super-2 number, since 2×72326553² = 10462260537723618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72326563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927225 + ... + 927302.

It is an arithmetic number, because the mean of its divisors is an integer number (12981696).

Almost surely, 2^72326553 is an apocalyptic number.

It is an amenable number.

72326553 is a deficient number, since it is larger than the sum of its proper divisors (31527015).

72326553 is a wasteful number, since it uses less digits than its factorization.

72326553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854543.

The product of its digits is 37800, while the sum is 33.

The square root of 72326553 is about 8504.5019254510. The cubic root of 72326553 is about 416.6447583859.

The spelling of 72326553 in words is "seventy-two million, three hundred twenty-six thousand, five hundred fifty-three".