2557943690 has 16 divisors (see below), whose sum is σ = 4604906592. Its totient is φ = 1023042384.

The previous prime is 2557943677. The next prime is 2557943701. The reversal of 2557943690 is 963497552.

It is a happy number.

It is a super-2 number, since 2×2557943690² = 13086151842421632200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103517 + ... + 125823.

It is an arithmetic number, because the mean of its divisors is an integer number (287806662).

Almost surely, 2^2557943690 is an apocalyptic number.

2557943690 is a deficient number, since it is larger than the sum of its proper divisors (2046962902).

2557943690 is a wasteful number, since it uses less digits than its factorization.

2557943690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33781.

The product of its (nonzero) digits is 2041200, while the sum is 50.

The square root of 2557943690 is about 50576.1177830011. The cubic root of 2557943690 is about 1367.6143841613.

The spelling of 2557943690 in words is "two billion, five hundred fifty-seven million, nine hundred forty-three thousand, six hundred ninety".