2645639454 has 32 divisors (see below), whose sum is σ = 5355797760. Its totient is φ = 871145792.

The previous prime is 2645639413. The next prime is 2645639459. The reversal of 2645639454 is 4549365462.

It is a super-2 number, since 2×2645639454² = 13998816241122836232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645639459) 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, 856597 + ... + 859679.

It is an arithmetic number, because the mean of its divisors is an integer number (167368680).

Almost surely, 2^2645639454 is an apocalyptic number.

2645639454 is an abundant number, since it is smaller than the sum of its proper divisors (2710158306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2645639454 is a wasteful number, since it uses less digits than its factorization.

2645639454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784.

The product of its digits is 3110400, while the sum is 48.

The square root of 2645639454 is about 51435.7799007656. The cubic root of 2645639454 is about 1383.0680626036.

The spelling of 2645639454 in words is "two billion, six hundred forty-five million, six hundred thirty-nine thousand, four hundred fifty-four".