100561616078 has 64 divisors (see below), whose sum is σ = 190570848768. Its totient is φ = 38660536320.

The previous prime is 100561616033. The next prime is 100561616093. The reversal of 100561616078 is 870616165001.

It is a super-2 number, since 2×100561616078² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3937526 + ... + 3962982.

It is an arithmetic number, because the mean of its divisors is an integer number (2977669512).

Almost surely, 2^100561616078 is an apocalyptic number.

100561616078 is a deficient number, since it is larger than the sum of its proper divisors (90009232690).

100561616078 is a wasteful number, since it uses less digits than its factorization.

100561616078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25817.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 100561616078 in words is "one hundred billion, five hundred sixty-one million, six hundred sixteen thousand, seventy-eight".