2557156373 has 2 divisors, whose sum is σ = 2557156374. Its totient is φ = 2557156372.

The previous prime is 2557156367. The next prime is 2557156411. The reversal of 2557156373 is 3736517552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2003636644 + 553519729 = 44762^2 + 23527^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557156373 - 2⁶ = 2557156309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557156073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278578186 + 1278578187.

It is an arithmetic number, because the mean of its divisors is an integer number (1278578187).

Almost surely, 2^2557156373 is an apocalyptic number.

It is an amenable number.

2557156373 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557156373 is an equidigital number, since it uses as much as digits as its factorization.

2557156373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 661500, while the sum is 44.

The square root of 2557156373 is about 50568.3336980763. Note that the first 3 decimals coincide. The cubic root of 2557156373 is about 1367.4740557472.

The spelling of 2557156373 in words is "two billion, five hundred fifty-seven million, one hundred fifty-six thousand, three hundred seventy-three".