2556457390 has 8 divisors (see below), whose sum is σ = 4601623320. Its totient is φ = 1022582952.

The previous prime is 2556457373. The next prime is 2556457403. The reversal of 2556457390 is 937546552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2556457390² = 13070948773771224200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2556457390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127822860 + ... + 127822879.

It is an arithmetic number, because the mean of its divisors is an integer number (575202915).

Almost surely, 2^2556457390 is an apocalyptic number.

2556457390 is a deficient number, since it is larger than the sum of its proper divisors (2045165930).

2556457390 is a wasteful number, since it uses less digits than its factorization.

2556457390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255645746.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The square root of 2556457390 is about 50561.4219538968. The cubic root of 2556457390 is about 1367.3494475128.

The spelling of 2556457390 in words is "two billion, five hundred fifty-six million, four hundred fifty-seven thousand, three hundred ninety".