61887716364 has 12 divisors (see below), whose sum is σ = 144404671544. Its totient is φ = 20629238784.

The previous prime is 61887716323. The next prime is 61887716369. The reversal of 61887716364 is 46361778816.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61887716369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2578654837 + ... + 2578654860.

Almost surely, 2^61887716364 is an apocalyptic number.

It is an amenable number.

61887716364 is an abundant number, since it is smaller than the sum of its proper divisors (82516955180).

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

61887716364 is a wasteful number, since it uses less digits than its factorization.

61887716364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5157309704 (or 5157309702 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 57.

The spelling of 61887716364 in words is "sixty-one billion, eight hundred eighty-seven million, seven hundred sixteen thousand, three hundred sixty-four".