61657944 has 32 divisors (see below), whose sum is σ = 159462000. Its totient is φ = 19843712.

The previous prime is 61657943. The next prime is 61657951. The reversal of 61657944 is 44975616.

It is a junction number, because it is equal to n+sod(n) for n = 61657896 and 61657905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61657943) 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, 43599 + ... + 44990.

Almost surely, 2^61657944 is an apocalyptic number.

It is an amenable number.

61657944 is an abundant number, since it is smaller than the sum of its proper divisors (97804056).

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

61657944 is a wasteful number, since it uses less digits than its factorization.

61657944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88627 (or 88623 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 61657944 is about 7852.2572550828. The cubic root of 61657944 is about 395.0599577841.

The spelling of 61657944 in words is "sixty-one million, six hundred fifty-seven thousand, nine hundred forty-four".