101564421918 has 16 divisors (see below), whose sum is σ = 203145636096. Its totient is φ = 33852008600.

The previous prime is 101564421899. The next prime is 101564421941. The reversal of 101564421918 is 819124465101.

It is a super-3 number, since 3×101564421918³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 101564421918.

It is a congruent number.

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, 620358 + ... + 766793.

It is an arithmetic number, because the mean of its divisors is an integer number (12696602256).

Almost surely, 2^101564421918 is an apocalyptic number.

101564421918 is an abundant number, since it is smaller than the sum of its proper divisors (101581214178).

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

101564421918 is a wasteful number, since it uses less digits than its factorization.

101564421918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399359.

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 101564421918 in words is "one hundred one billion, five hundred sixty-four million, four hundred twenty-one thousand, nine hundred eighteen".