61881174264 has 64 divisors (see below), whose sum is σ = 190403619840. Its totient is φ = 16320309120.

The previous prime is 61881174259. The next prime is 61881174319. The reversal of 61881174264 is 46247118816.

It is a super-3 number, since 3×61881174264³ (a number of 33 digits) contains 333 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14164752 + ... + 14169119.

It is an arithmetic number, because the mean of its divisors is an integer number (2975056560).

Almost surely, 2^61881174264 is an apocalyptic number.

It is an amenable number.

61881174264 is an abundant number, since it is smaller than the sum of its proper divisors (128522445576).

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

61881174264 is a wasteful number, since it uses less digits than its factorization.

61881174264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28333900 (or 28333896 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The spelling of 61881174264 in words is "sixty-one billion, eight hundred eighty-one million, one hundred seventy-four thousand, two hundred sixty-four".