25134140549 has 4 divisors (see below), whose sum is σ = 28724732064. Its totient is φ = 21543549036.

The previous prime is 25134140539. The next prime is 25134140567. The reversal of 25134140549 is 94504143152.

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 25134140549 - 2⁴ = 25134140533 is a prime.

It is a super-2 number, since 2×25134140549² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25134140539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1795295747 + ... + 1795295760.

It is an arithmetic number, because the mean of its divisors is an integer number (7181183016).

Almost surely, 2^25134140549 is an apocalyptic number.

It is an amenable number.

25134140549 is a deficient number, since it is larger than the sum of its proper divisors (3590591515).

25134140549 is an equidigital number, since it uses as much as digits as its factorization.

25134140549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590591514.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 25134140549 in words is "twenty-five billion, one hundred thirty-four million, one hundred forty thousand, five hundred forty-nine".