25245540140 has 48 divisors (see below), whose sum is σ = 55828301760. Its totient is φ = 9570528000.

The previous prime is 25245540139. The next prime is 25245540167. The reversal of 25245540140 is 4104554252.

It is a junction number, because it is equal to n+sod(n) for n = 25245540097 and 25245540106.

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, 201611 + ... + 301890.

It is an arithmetic number, because the mean of its divisors is an integer number (1163089620).

Almost surely, 2^25245540140 is an apocalyptic number.

25245540140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25245540140 is an abundant number, since it is smaller than the sum of its proper divisors (30582761620).

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

25245540140 is a wasteful number, since it uses less digits than its factorization.

25245540140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503642 (or 503640 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

The spelling of 25245540140 in words is "twenty-five billion, two hundred forty-five million, five hundred forty thousand, one hundred forty".