100861775720 has 16 divisors (see below), whose sum is σ = 226938995460. Its totient is φ = 40344710272.

The previous prime is 100861775683. The next prime is 100861775741. The reversal of 100861775720 is 27577168001.

It can be written as a sum of positive squares in 2 ways, for example, as 99907830724 + 953944996 = 316082^2 + 30886^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1260772157 + ... + 1260772236.

Almost surely, 2^100861775720 is an apocalyptic number.

100861775720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100861775720 is an abundant number, since it is smaller than the sum of its proper divisors (126077219740).

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

100861775720 is a wasteful number, since it uses less digits than its factorization.

100861775720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521544404 (or 2521544400 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 44.

The spelling of 100861775720 in words is "one hundred billion, eight hundred sixty-one million, seven hundred seventy-five thousand, seven hundred twenty".