25511000620 has 96 divisors (see below), whose sum is σ = 63935520768. Its totient is φ = 8360174592.

The previous prime is 25511000591. The next prime is 25511000623. The reversal of 25511000620 is 2600011552.

It is a super-2 number, since 2×25511000620² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25511000591 and 25511000600.

It is not an unprimeable number, because it can be changed into a prime (25511000623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6898612 + ... + 6902308.

It is an arithmetic number, because the mean of its divisors is an integer number (665995008).

Almost surely, 2^25511000620 is an apocalyptic number.

25511000620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25511000620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31967760384).

25511000620 is an abundant number, since it is smaller than the sum of its proper divisors (38424520148).

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

25511000620 is a wasteful number, since it uses less digits than its factorization.

25511000620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5879 (or 5877 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 25511000620 in words is "twenty-five billion, five hundred eleven million, six hundred twenty", and thus it is an aban number.