25355065540 has 48 divisors (see below), whose sum is σ = 62815140864. Its totient is φ = 8412739200.

The previous prime is 25355065537. The next prime is 25355065579. The reversal of 25355065540 is 4556055352.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25355065493 and 25355065502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2916751 + ... + 2925430.

It is an arithmetic number, because the mean of its divisors is an integer number (1308648768).

Almost surely, 2^25355065540 is an apocalyptic number.

25355065540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25355065540 is an abundant number, since it is smaller than the sum of its proper divisors (37460075324).

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

25355065540 is a wasteful number, since it uses less digits than its factorization.

25355065540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5842228 (or 5842226 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 40.

The spelling of 25355065540 in words is "twenty-five billion, three hundred fifty-five million, sixty-five thousand, five hundred forty".