2545923157 has 4 divisors (see below), whose sum is σ = 2546500876. Its totient is φ = 2545345440.

The previous prime is 2545923139. The next prime is 2545923169. The reversal of 2545923157 is 7513295452.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1869611121 + 676312036 = 43239^2 + 26006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2545923157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545923557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282198 + ... + 291079.

It is an arithmetic number, because the mean of its divisors is an integer number (636625219).

Almost surely, 2^2545923157 is an apocalyptic number.

It is an amenable number.

2545923157 is a deficient number, since it is larger than the sum of its proper divisors (577719).

2545923157 is an equidigital number, since it uses as much as digits as its factorization.

2545923157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577718.

The product of its digits is 378000, while the sum is 43.

The square root of 2545923157 is about 50457.1417838942. The cubic root of 2545923157 is about 1365.4687449871.

The spelling of 2545923157 in words is "two billion, five hundred forty-five million, nine hundred twenty-three thousand, one hundred fifty-seven".