25514135540 has 12 divisors (see below), whose sum is σ = 53579684676. Its totient is φ = 10205654208.

The previous prime is 25514135501. The next prime is 25514135593. The reversal of 25514135540 is 4553141552.

It can be written as a sum of positive squares in 2 ways, for example, as 12299253604 + 13214881936 = 110902^2 + 114956^2 .

It is a super-2 number, since 2×25514135540² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25514135540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637853369 + ... + 637853408.

It is an arithmetic number, because the mean of its divisors is an integer number (4464973723).

Almost surely, 2^25514135540 is an apocalyptic number.

25514135540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25514135540 is an abundant number, since it is smaller than the sum of its proper divisors (28065549136).

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

25514135540 is a wasteful number, since it uses less digits than its factorization.

25514135540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275706786 (or 1275706784 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 25514135540 in words is "twenty-five billion, five hundred fourteen million, one hundred thirty-five thousand, five hundred forty".