72461155 has 32 divisors (see below), whose sum is σ = 102896640. Its totient is φ = 48470400.

The previous prime is 72461153. The next prime is 72461171. The reversal of 72461155 is 55116427.

It is not a de Polignac number, because 72461155 - 2¹ = 72461153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72461153) 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 31 ways as a sum of consecutive naturals, for example, 27130 + ... + 29680.

It is an arithmetic number, because the mean of its divisors is an integer number (3215520).

Almost surely, 2^72461155 is an apocalyptic number.

72461155 is a deficient number, since it is larger than the sum of its proper divisors (30435485).

72461155 is a wasteful number, since it uses less digits than its factorization.

72461155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611.

The product of its digits is 8400, while the sum is 31.

The square root of 72461155 is about 8512.4118203950. The cubic root of 72461155 is about 416.9030612347.

The spelling of 72461155 in words is "seventy-two million, four hundred sixty-one thousand, one hundred fifty-five".