2557740617 has 4 divisors (see below), whose sum is σ = 2568910020. Its totient is φ = 2546571216.

The previous prime is 2557740589. The next prime is 2557740629. The reversal of 2557740617 is 7160477552.

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 2253970576 + 303770041 = 47476^2 + 17429^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557740617 - 2¹⁴ = 2557724233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557740217) 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, 5584358 + ... + 5584815.

It is an arithmetic number, because the mean of its divisors is an integer number (642227505).

Almost surely, 2^2557740617 is an apocalyptic number.

It is an amenable number.

2557740617 is a deficient number, since it is larger than the sum of its proper divisors (11169403).

2557740617 is a wasteful number, since it uses less digits than its factorization.

2557740617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11169402.

The product of its (nonzero) digits is 411600, while the sum is 44.

The square root of 2557740617 is about 50574.1101454094. The cubic root of 2557740617 is about 1367.5781919513.

The spelling of 2557740617 in words is "two billion, five hundred fifty-seven million, seven hundred forty thousand, six hundred seventeen".