25500502749 has 32 divisors (see below), whose sum is σ = 36736272000. Its totient is φ = 15699688704.

The previous prime is 25500502747. The next prime is 25500502751. The reversal of 25500502749 is 94720500552.

It is an interprime number because it is at equal distance from previous prime (25500502747) and next prime (25500502751).

It is not a de Polignac number, because 25500502749 - 2¹ = 25500502747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25500502747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122787 + ... + 257055.

It is an arithmetic number, because the mean of its divisors is an integer number (1148008500).

Almost surely, 2^25500502749 is an apocalyptic number.

25500502749 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

25500502749 is a deficient number, since it is larger than the sum of its proper divisors (11235769251).

25500502749 is a wasteful number, since it uses less digits than its factorization.

25500502749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134397.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 25500502749 in words is "twenty-five billion, five hundred million, five hundred two thousand, seven hundred forty-nine".