61881918716 has 24 divisors (see below), whose sum is σ = 110443831344. Its totient is φ = 30327672960.

The previous prime is 61881918701. The next prime is 61881918797. The reversal of 61881918716 is 61781918816.

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 7 ways as a sum of consecutive naturals, for example, 77711 + ... + 360281.

It is an arithmetic number, because the mean of its divisors is an integer number (4601826306).

Almost surely, 2^61881918716 is an apocalyptic number.

It is an amenable number.

61881918716 is a deficient number, since it is larger than the sum of its proper divisors (48561912628).

61881918716 is a wasteful number, since it uses less digits than its factorization.

61881918716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283661 (or 283659 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 56.

The spelling of 61881918716 in words is "sixty-one billion, eight hundred eighty-one million, nine hundred eighteen thousand, seven hundred sixteen".