61577872 has 20 divisors (see below), whose sum is σ = 119813760. Its totient is φ = 30658208.

The previous prime is 61577869. The next prime is 61577897. The reversal of 61577872 is 27877516.

61577872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4228 + ... + 11875.

It is an arithmetic number, because the mean of its divisors is an integer number (5990688).

Almost surely, 2^61577872 is an apocalyptic number.

It is an amenable number.

61577872 is a deficient number, since it is larger than the sum of its proper divisors (58235888).

61577872 is a wasteful number, since it uses less digits than its factorization.

61577872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16350 (or 16344 counting only the distinct ones).

The product of its digits is 164640, while the sum is 43.

The square root of 61577872 is about 7847.1569373882. The cubic root of 61577872 is about 394.8888690199. Note that the first 4 decimals are identical.

It can be divided in two parts, 615 and 77872, that added together give a palindrome (78487).

The spelling of 61577872 in words is "sixty-one million, five hundred seventy-seven thousand, eight hundred seventy-two".