2605782157 has 16 divisors (see below), whose sum is σ = 2888169984. Its totient is φ = 2331054000.

The previous prime is 2605782149. The next prime is 2605782163. The reversal of 2605782157 is 7512875062.

It is not a de Polignac number, because 2605782157 - 2³ = 2605782149 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 (2605782167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1348482 + ... + 1350412.

It is an arithmetic number, because the mean of its divisors is an integer number (180510624).

Almost surely, 2^2605782157 is an apocalyptic number.

It is an amenable number.

2605782157 is a deficient number, since it is larger than the sum of its proper divisors (282387827).

2605782157 is a wasteful number, since it uses less digits than its factorization.

2605782157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 2605782157 is about 51046.8623619513. The cubic root of 2605782157 is about 1376.0874539144.

The spelling of 2605782157 in words is "two billion, six hundred five million, seven hundred eighty-two thousand, one hundred fifty-seven".