25407513137 has 4 divisors (see below), whose sum is σ = 25632358500. Its totient is φ = 25182667776.

The previous prime is 25407513133. The next prime is 25407513191. The reversal of 25407513137 is 73131570452.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7708137616 + 17699375521 = 87796^2 + 133039^2 .

It is a cyclic number.

It is not a de Polignac number, because 25407513137 - 2² = 25407513133 is a prime.

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 25407513137.

It is not an unprimeable number, because it can be changed into a prime (25407513133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112422512 + ... + 112422737.

It is an arithmetic number, because the mean of its divisors is an integer number (6408089625).

Almost surely, 2^25407513137 is an apocalyptic number.

It is an amenable number.

25407513137 is a deficient number, since it is larger than the sum of its proper divisors (224845363).

25407513137 is a wasteful number, since it uses less digits than its factorization.

25407513137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224845362.

The product of its (nonzero) digits is 88200, while the sum is 38.

The spelling of 25407513137 in words is "twenty-five billion, four hundred seven million, five hundred thirteen thousand, one hundred thirty-seven".