2539691953 has 4 divisors (see below), whose sum is σ = 2593728000. Its totient is φ = 2485655908.

The previous prime is 2539691933. The next prime is 2539691969. The reversal of 2539691953 is 3591969352.

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 2539691953 - 2²⁵ = 2506137521 is a prime.

It is a super-2 number, since 2×2539691953² = 12900070432265908418, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2539691953.

It is not an unprimeable number, because it can be changed into a prime (2539691923) 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, 27017953 + ... + 27018046.

It is an arithmetic number, because the mean of its divisors is an integer number (648432000).

Almost surely, 2^2539691953 is an apocalyptic number.

It is an amenable number.

2539691953 is a deficient number, since it is larger than the sum of its proper divisors (54036047).

2539691953 is an equidigital number, since it uses as much as digits as its factorization.

2539691953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54036046.

The product of its digits is 1968300, while the sum is 52.

The square root of 2539691953 is about 50395.3564626742. The cubic root of 2539691953 is about 1364.3538297772.

The spelling of 2539691953 in words is "two billion, five hundred thirty-nine million, six hundred ninety-one thousand, nine hundred fifty-three".