2557086643 has 2 divisors, whose sum is σ = 2557086644. Its totient is φ = 2557086642.

The previous prime is 2557086619. The next prime is 2557086661. The reversal of 2557086643 is 3466807552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2557086643 - 2⁵ = 2557086611 is a prime.

It is a super-3 number, since 3×2557086643³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2557086593 and 2557086602.

It is not a weakly prime, because it can be changed into another prime (2557081643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278543321 + 1278543322.

It is an arithmetic number, because the mean of its divisors is an integer number (1278543322).

Almost surely, 2^2557086643 is an apocalyptic number.

2557086643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557086643 is an equidigital number, since it uses as much as digits as its factorization.

2557086643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The square root of 2557086643 is about 50567.6442302783. The cubic root of 2557086643 is about 1367.4616259464.

The spelling of 2557086643 in words is "two billion, five hundred fifty-seven million, eighty-six thousand, six hundred forty-three".