25313455620 has 144 divisors (see below), whose sum is σ = 80252368560. Its totient is φ = 6450167808.

The previous prime is 25313455589. The next prime is 25313455681. The reversal of 25313455620 is 2655431352.

25313455620 is a `hidden beast` number, since 2 + 53 + 1 + 3 + 45 + 562 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 9216 + 25313446404 = 96^2 + 159102^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 481344 + ... + 531336.

It is an arithmetic number, because the mean of its divisors is an integer number (557308115).

Almost surely, 2^25313455620 is an apocalyptic number.

25313455620 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 25313455620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40126184280).

25313455620 is an abundant number, since it is smaller than the sum of its proper divisors (54938912940).

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

25313455620 is a wasteful number, since it uses less digits than its factorization.

25313455620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50134 (or 50129 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 25313455620 its reverse (2655431352), we get a palindrome (27968886972).

The spelling of 25313455620 in words is "twenty-five billion, three hundred thirteen million, four hundred fifty-five thousand, six hundred twenty".