10204056561561 has 8 divisors (see below), whose sum is σ = 13605424569984. Its totient is φ = 6802696463760.

The previous prime is 10204056561499. The next prime is 10204056561593. The reversal of 10204056561561 is 16516565040201.

10204056561561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10204056561561 - 2²³ = 10204048172953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10204056562561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2445216 + ... + 5136846.

It is an arithmetic number, because the mean of its divisors is an integer number (1700678071248).

Almost surely, 2^{10204056561561} is an apocalyptic number.

It is an amenable number.

10204056561561 is a deficient number, since it is larger than the sum of its proper divisors (3401368008423).

10204056561561 is a wasteful number, since it uses less digits than its factorization.

10204056561561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955311.

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 10204056561561 in words is "ten trillion, two hundred four billion, fifty-six million, five hundred sixty-one thousand, five hundred sixty-one".