2657605491 has 8 divisors (see below), whose sum is σ = 3937193360. Its totient is φ = 1771736976.

The previous prime is 2657605477. The next prime is 2657605507. The reversal of 2657605491 is 1945067562.

2657605491 is a `hidden beast` number, since 26 + 576 + 0 + 54 + 9 + 1 = 666.

It is not a de Polignac number, because 2657605491 - 2²³ = 2649216883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2657605471) 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, 49214890 + ... + 49214943.

It is an arithmetic number, because the mean of its divisors is an integer number (492149170).

Almost surely, 2^2657605491 is an apocalyptic number.

2657605491 is a deficient number, since it is larger than the sum of its proper divisors (1279587869).

2657605491 is an equidigital number, since it uses as much as digits as its factorization.

2657605491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98429842 (or 98429836 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 2657605491 is about 51551.9688372811. The cubic root of 2657605491 is about 1385.1500992472.

The spelling of 2657605491 in words is "two billion, six hundred fifty-seven million, six hundred five thousand, four hundred ninety-one".