2645506831 has 8 divisors (see below), whose sum is σ = 2902691664. Its totient is φ = 2391102720.

The previous prime is 2645506823. The next prime is 2645506847. The reversal of 2645506831 is 1386055462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2645506831 - 2³ = 2645506823 is a prime.

It is a super-2 number, since 2×2645506831² = 13997412785735325122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645507831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693186 + ... + 696991.

It is an arithmetic number, because the mean of its divisors is an integer number (362836458).

Almost surely, 2^2645506831 is an apocalyptic number.

2645506831 is a deficient number, since it is larger than the sum of its proper divisors (257184833).

2645506831 is a wasteful number, since it uses less digits than its factorization.

2645506831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390361.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 2645506831 is about 51434.4906750324. The cubic root of 2645506831 is about 1383.0449516564.

The spelling of 2645506831 in words is "two billion, six hundred forty-five million, five hundred six thousand, eight hundred thirty-one".