61919164 has 18 divisors (see below), whose sum is σ = 109215344. Its totient is φ = 30716280.

The previous prime is 61919153. The next prime is 61919191. The reversal of 61919164 is 46191916.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 228349 + ... + 228619.

Almost surely, 2^61919164 is an apocalyptic number.

It is an amenable number.

61919164 is a deficient number, since it is larger than the sum of its proper divisors (47296180).

61919164 is a wasteful number, since it uses less digits than its factorization.

61919164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 512 counting only the distinct ones).

The product of its digits is 11664, while the sum is 37.

The square root of 61919164 is about 7868.8731086478. The cubic root of 61919164 is about 395.6170753371.

The spelling of 61919164 in words is "sixty-one million, nine hundred nineteen thousand, one hundred sixty-four".