61701872918 has 16 divisors (see below), whose sum is σ = 106275945984. Its totient is φ = 26318333160.

The previous prime is 61701872909. The next prime is 61701872977. The reversal of 61701872918 is 81927810716.

It is a super-2 number, since 2×61701872918² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10440830 + ... + 10446737.

It is an arithmetic number, because the mean of its divisors is an integer number (6642246624).

Almost surely, 2^61701872918 is an apocalyptic number.

61701872918 is a deficient number, since it is larger than the sum of its proper divisors (44574073066).

61701872918 is a wasteful number, since it uses less digits than its factorization.

61701872918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20887787.

The product of its (nonzero) digits is 338688, while the sum is 50.

The spelling of 61701872918 in words is "sixty-one billion, seven hundred one million, eight hundred seventy-two thousand, nine hundred eighteen".