2657950005561 has 32 divisors (see below), whose sum is σ = 3639021226368. Its totient is φ = 1724714449920.

The previous prime is 2657950005551. The next prime is 2657950005587. The reversal of 2657950005561 is 1655000597562.

2657950005561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2657950005561 - 2¹³ = 2657949997369 is a prime.

It is a super-4 number, since 4×2657950005561⁴ (a number of 51 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (2657950005551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143811441 + ... + 143829921.

It is an arithmetic number, because the mean of its divisors is an integer number (113719413324).

Almost surely, 2^{2657950005561} is an apocalyptic number.

It is an amenable number.

2657950005561 is a deficient number, since it is larger than the sum of its proper divisors (981071220807).

2657950005561 is a wasteful number, since it uses less digits than its factorization.

2657950005561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22361.

The product of its (nonzero) digits is 2835000, while the sum is 51.

The spelling of 2657950005561 in words is "two trillion, six hundred fifty-seven billion, nine hundred fifty million, five thousand, five hundred sixty-one".