2556453657 has 64 divisors (see below), whose sum is σ = 3822059520. Its totient is φ = 1514356800.

The previous prime is 2556453623. The next prime is 2556453661. The reversal of 2556453657 is 7563546552.

It is not a de Polignac number, because 2556453657 - 2²³ = 2548065049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2556453257) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5931232 + ... + 5931662.

It is an arithmetic number, because the mean of its divisors is an integer number (59719680).

Almost surely, 2^2556453657 is an apocalyptic number.

It is an amenable number.

2556453657 is a deficient number, since it is larger than the sum of its proper divisors (1265605863).

2556453657 is a wasteful number, since it uses less digits than its factorization.

2556453657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594.

The product of its digits is 3780000, while the sum is 48.

The square root of 2556453657 is about 50561.3850383868. The cubic root of 2556453657 is about 1367.3487819670.

The spelling of 2556453657 in words is "two billion, five hundred fifty-six million, four hundred fifty-three thousand, six hundred fifty-seven".