2561202560416 has 12 divisors (see below), whose sum is σ = 5042367540882. Its totient is φ = 1280601280192.

The previous prime is 2561202560407. The next prime is 2561202560437. The reversal of 2561202560416 is 6140652021652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2432364636816 + 128837923600 = 1559604^2 + 358940^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40018789975 + ... + 40018790038.

Almost surely, 2^{2561202560416} is an apocalyptic number.

It is an amenable number.

2561202560416 is a deficient number, since it is larger than the sum of its proper divisors (2481164980466).

2561202560416 is an equidigital number, since it uses as much as digits as its factorization.

2561202560416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80037580023 (or 80037580015 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 2561202560416 in words is "two trillion, five hundred sixty-one billion, two hundred two million, five hundred sixty thousand, four hundred sixteen".