2645878431 has 12 divisors (see below), whose sum is σ = 4103811672. Its totient is φ = 1511930448.

The previous prime is 2645878373. The next prime is 2645878463. The reversal of 2645878431 is 1348785462.

It is not a de Polignac number, because 2645878431 - 2¹⁰ = 2645877407 is a prime.

It is a super-2 number, since 2×2645878431² = 14001345343262043522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645878331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8999440 + ... + 8999733.

It is an arithmetic number, because the mean of its divisors is an integer number (341984306).

Almost surely, 2^2645878431 is an apocalyptic number.

2645878431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2645878431 is a deficient number, since it is larger than the sum of its proper divisors (1457933241).

2645878431 is a wasteful number, since it uses less digits than its factorization.

2645878431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17999190 (or 17999183 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The square root of 2645878431 is about 51438.1029101968. The cubic root of 2645878431 is about 1383.1097048997.

The spelling of 2645878431 in words is "two billion, six hundred forty-five million, eight hundred seventy-eight thousand, four hundred thirty-one".