25540512207 has 48 divisors (see below), whose sum is σ = 41977468512. Its totient is φ = 13725143040.

The previous prime is 25540512197. The next prime is 25540512229. The reversal of 25540512207 is 70221504552.

It is not a de Polignac number, because 25540512207 - 2⁶ = 25540512143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540512247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3877657 + ... + 3884237.

It is an arithmetic number, because the mean of its divisors is an integer number (874530594).

Almost surely, 2^25540512207 is an apocalyptic number.

25540512207 is a deficient number, since it is larger than the sum of its proper divisors (16436956305).

25540512207 is a wasteful number, since it uses less digits than its factorization.

25540512207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8168 (or 8161 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 33.

The spelling of 25540512207 in words is "twenty-five billion, five hundred forty million, five hundred twelve thousand, two hundred seven".