100561045456 has 10 divisors (see below), whose sum is σ = 194837025602. Its totient is φ = 50280522720.

The previous prime is 100561045451. The next prime is 100561045477. The reversal of 100561045456 is 654540165001.

It can be written as a sum of positive squares in only one way, i.e., 91071168400 + 9489877056 = 301780^2 + 97416^2 .

It is a super-2 number, since 2×100561045456² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100561045451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3142532655 + ... + 3142532686.

Almost surely, 2^100561045456 is an apocalyptic number.

100561045456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

100561045456 is a deficient number, since it is larger than the sum of its proper divisors (94275980146).

100561045456 is an equidigital number, since it uses as much as digits as its factorization.

100561045456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6285065349 (or 6285065343 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 100561045456 in words is "one hundred billion, five hundred sixty-one million, forty-five thousand, four hundred fifty-six".