100561565551525 has 12 divisors (see below), whose sum is σ = 134288367536932. Its totient is φ = 74260848407040.

The previous prime is 100561565551483. The next prime is 100561565551553. The reversal of 100561565551525 is 525155565165001.

It can be written as a sum of positive squares in 6 ways, for example, as 13768604308449 + 86792961243076 = 3710607^2 + 9316274^2 .

It is not a de Polignac number, because 100561565551525 - 2⁷ = 100561565551397 is a prime.

It is a super-2 number, since 2×100561565551525² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154710100524 + ... + 154710101173.

Almost surely, 2^{100561565551525} is an apocalyptic number.

It is an amenable number.

100561565551525 is a deficient number, since it is larger than the sum of its proper divisors (33726801985407).

100561565551525 is a wasteful number, since it uses less digits than its factorization.

100561565551525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309420201720 (or 309420201715 counting only the distinct ones).

The product of its (nonzero) digits is 5625000, while the sum is 52.

The spelling of 100561565551525 in words is "one hundred trillion, five hundred sixty-one billion, five hundred sixty-five million, five hundred fifty-one thousand, five hundred twenty-five".