25531175340 has 72 divisors (see below), whose sum is σ = 84484986768. Its totient is φ = 6189375360.

The previous prime is 25531175339. The next prime is 25531175381. The reversal of 25531175340 is 4357113552.

25531175340 is a `hidden beast` number, since 2 + 5 + 5 + 3 + 117 + 534 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25531175295 and 25531175304.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6445287 + ... + 6449246.

It is an arithmetic number, because the mean of its divisors is an integer number (1173402594).

Almost surely, 2^25531175340 is an apocalyptic number.

25531175340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25531175340 is an abundant number, since it is smaller than the sum of its proper divisors (58953811428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25531175340 is a wasteful number, since it uses less digits than its factorization.

25531175340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12894559 (or 12894554 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

Adding to 25531175340 its reverse (4357113552), we get a palindrome (29888288892).

The spelling of 25531175340 in words is "twenty-five billion, five hundred thirty-one million, one hundred seventy-five thousand, three hundred forty".