25615613020 has 24 divisors (see below), whose sum is σ = 53799190704. Its totient is φ = 10245025536.

The previous prime is 25615613003. The next prime is 25615613027. The reversal of 25615613020 is 2031651652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25615613027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106692 + ... + 250228.

It is an arithmetic number, because the mean of its divisors is an integer number (2241632946).

Almost surely, 2^25615613020 is an apocalyptic number.

25615613020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25615613020 is an abundant number, since it is smaller than the sum of its proper divisors (28183577684).

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

25615613020 is a wasteful number, since it uses less digits than its factorization.

25615613020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152469 (or 152467 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 25615613020 in words is "twenty-five billion, six hundred fifteen million, six hundred thirteen thousand, twenty".