2557491749366 has 16 divisors (see below), whose sum is σ = 4038373293360. Its totient is φ = 1211374932480.

The previous prime is 2557491749359. The next prime is 2557491749387. The reversal of 2557491749366 is 6639471947552.

It is a super-2 number, since 2×2557491749366² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2557491749296 and 2557491749305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1219751 + ... + 2569586.

It is an arithmetic number, because the mean of its divisors is an integer number (252398330835).

Almost surely, 2^{2557491749366} is an apocalyptic number.

2557491749366 is a deficient number, since it is larger than the sum of its proper divisors (1480881543994).

2557491749366 is a wasteful number, since it uses less digits than its factorization.

2557491749366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807119.

The product of its digits is 342921600, while the sum is 68.

The spelling of 2557491749366 in words is "two trillion, five hundred fifty-seven billion, four hundred ninety-one million, seven hundred forty-nine thousand, three hundred sixty-six".