25136834117 has 16 divisors (see below), whose sum is σ = 27315723312. Its totient is φ = 23042273280.

The previous prime is 25136834071. The next prime is 25136834123. The reversal of 25136834117 is 71143863152.

It is a Cunningham number, because it is equal to 158546²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 3515778436 + 21621055681 = 59294^2 + 147041^2 .

It is not a de Polignac number, because 25136834117 - 2⁶ = 25136834053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25136834137) 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 15 ways as a sum of consecutive naturals, for example, 21617 + ... + 225257.

It is an arithmetic number, because the mean of its divisors is an integer number (1707232707).

Almost surely, 2^25136834117 is an apocalyptic number.

It is an amenable number.

25136834117 is a deficient number, since it is larger than the sum of its proper divisors (2178889195).

25136834117 is a wasteful number, since it uses less digits than its factorization.

25136834117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203848.

The product of its digits is 120960, while the sum is 41.

The spelling of 25136834117 in words is "twenty-five billion, one hundred thirty-six million, eight hundred thirty-four thousand, one hundred seventeen".