100561052057 has 4 divisors (see below), whose sum is σ = 102209593956. Its totient is φ = 98912510160.

The previous prime is 100561052047. The next prime is 100561052083. The reversal of 100561052057 is 750250165001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14291963401 + 86269088656 = 119549^2 + 293716^2 .

It is not a de Polignac number, because 100561052057 - 2⁴ = 100561052041 is a prime.

It is a super-2 number, since 2×100561052057² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100561052047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824270858 + ... + 824270979.

It is an arithmetic number, because the mean of its divisors is an integer number (25552398489).

Almost surely, 2^100561052057 is an apocalyptic number.

It is an amenable number.

100561052057 is a deficient number, since it is larger than the sum of its proper divisors (1648541899).

100561052057 is an equidigital number, since it uses as much as digits as its factorization.

100561052057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648541898.

The product of its (nonzero) digits is 10500, while the sum is 32.

The spelling of 100561052057 in words is "one hundred billion, five hundred sixty-one million, fifty-two thousand, fifty-seven".