2657002561 has 4 divisors (see below), whose sum is σ = 2680515972. Its totient is φ = 2633489152.

The previous prime is 2657002553. The next prime is 2657002567. The reversal of 2657002561 is 1652007562.

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 415548225 + 2241454336 = 20385^2 + 47344^2 .

It is a cyclic number.

It is not a de Polignac number, because 2657002561 - 2³ = 2657002553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2657002567) 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, 11756536 + ... + 11756761.

It is an arithmetic number, because the mean of its divisors is an integer number (670128993).

Almost surely, 2^2657002561 is an apocalyptic number.

It is an amenable number.

2657002561 is a deficient number, since it is larger than the sum of its proper divisors (23513411).

2657002561 is a wasteful number, since it uses less digits than its factorization.

2657002561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23513410.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 2657002561 is about 51546.1207172761. The cubic root of 2657002561 is about 1385.0453418234.

The spelling of 2657002561 in words is "two billion, six hundred fifty-seven million, two thousand, five hundred sixty-one".