100625343561 has 6 divisors (see below), whose sum is σ = 145347718490. Its totient is φ = 67083562368.

The previous prime is 100625343487. The next prime is 100625343587. The reversal of 100625343561 is 165343526001.

100625343561 is a `hidden beast` number, since 1 + 0 + 0 + 6 + 2 + 53 + 43 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 63504000000 + 37121343561 = 252000^2 + 192669^2 .

It is a de Polignac number, because none of the positive numbers 2^k-100625343561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100625343461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5590296856 + ... + 5590296873.

Almost surely, 2^100625343561 is an apocalyptic number.

It is an amenable number.

100625343561 is a deficient number, since it is larger than the sum of its proper divisors (44722374929).

100625343561 is a wasteful number, since it uses less digits than its factorization.

100625343561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11180593735 (or 11180593732 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 100625343561 its reverse (165343526001), we get a palindrome (265968869562).

The spelling of 100625343561 in words is "one hundred billion, six hundred twenty-five million, three hundred forty-three thousand, five hundred sixty-one".