2638553274 has 72 divisors (see below), whose sum is σ = 6725152980. Its totient is φ = 745379712.

The previous prime is 2638553263. The next prime is 2638553297. The reversal of 2638553274 is 4723558362.

2638553274 is a `hidden beast` number, since 2 + 638 + 5 + 5 + 3 + 2 + 7 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2400314049 + 238239225 = 48993^2 + 15435^2 .

It is a super-2 number, since 2×2638553274² = 13923926759472238152, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 61692 + ... + 95304.

Almost surely, 2^2638553274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2638553274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3362576490).

2638553274 is an abundant number, since it is smaller than the sum of its proper divisors (4086599706).

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

2638553274 is a wasteful number, since it uses less digits than its factorization.

2638553274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33724 (or 33714 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The square root of 2638553274 is about 51366.8499520849. The cubic root of 2638553274 is about 1381.8321380293.

The spelling of 2638553274 in words is "two billion, six hundred thirty-eight million, five hundred fifty-three thousand, two hundred seventy-four".