72561954 has 16 divisors (see below), whose sum is σ = 146456640. Its totient is φ = 23965200.

The previous prime is 72561911. The next prime is 72561977. The reversal of 72561954 is 45916527.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 54822 + ... + 56129.

It is an arithmetic number, because the mean of its divisors is an integer number (9153540).

Almost surely, 2^72561954 is an apocalyptic number.

72561954 is an abundant number, since it is smaller than the sum of its proper divisors (73894686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72561954 is a wasteful number, since it uses less digits than its factorization.

72561954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111065.

The product of its digits is 75600, while the sum is 39.

The square root of 72561954 is about 8518.3304702271. The cubic root of 72561954 is about 417.0962863302.

The spelling of 72561954 in words is "seventy-two million, five hundred sixty-one thousand, nine hundred fifty-four".