61253644 has 24 divisors (see below), whose sum is σ = 116480000. Its totient is φ = 28077840.

The previous prime is 61253641. The next prime is 61253653. The reversal of 61253644 is 44635216.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (61253641) 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 7 ways as a sum of consecutive naturals, for example, 10644 + ... + 15355.

Almost surely, 2^61253644 is an apocalyptic number.

It is an amenable number.

61253644 is a deficient number, since it is larger than the sum of its proper divisors (55226356).

61253644 is a wasteful number, since it uses less digits than its factorization.

61253644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26053 (or 26051 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 61253644 is about 7826.4707244070. The cubic root of 61253644 is about 394.1945752331.

The spelling of 61253644 in words is "sixty-one million, two hundred fifty-three thousand, six hundred forty-four".