61163664 has 40 divisors (see below), whose sum is σ = 162281280. Its totient is φ = 19836288.

The previous prime is 61163659. The next prime is 61163699. The reversal of 61163664 is 46636116.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15444 + ... + 18995.

It is an arithmetic number, because the mean of its divisors is an integer number (4057032).

Almost surely, 2^61163664 is an apocalyptic number.

It is an amenable number.

61163664 is an abundant number, since it is smaller than the sum of its proper divisors (101117616).

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

61163664 is a wasteful number, since it uses less digits than its factorization.

61163664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34487 (or 34481 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 61163664 is about 7820.7201714420. The cubic root of 61163664 is about 394.0014601370.

The spelling of 61163664 in words is "sixty-one million, one hundred sixty-three thousand, six hundred sixty-four".