2639964253 has 4 divisors (see below), whose sum is σ = 2778909760. Its totient is φ = 2501018748.

The previous prime is 2639964199. The next prime is 2639964277. The reversal of 2639964253 is 3524699362.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2639964253 - 2⁹ = 2639963741 is a prime.

It is a super-2 number, since 2×2639964253² = 13938822514235696018, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2639964197 and 2639964206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639964953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69472725 + ... + 69472762.

It is an arithmetic number, because the mean of its divisors is an integer number (694727440).

Almost surely, 2^2639964253 is an apocalyptic number.

It is an amenable number.

2639964253 is a deficient number, since it is larger than the sum of its proper divisors (138945507).

2639964253 is a wasteful number, since it uses less digits than its factorization.

2639964253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138945506.

The product of its digits is 2099520, while the sum is 49.

The square root of 2639964253 is about 51380.5824509610. The cubic root of 2639964253 is about 1382.0784079211.

The spelling of 2639964253 in words is "two billion, six hundred thirty-nine million, nine hundred sixty-four thousand, two hundred fifty-three".