25183379520 has 420 divisors, whose sum is σ = 97019554500. Its totient is φ = 6197907456.

The previous prime is 25183379503. The next prime is 25183379521. The reversal of 25183379520 is 2597338152.

25183379520 is a `hidden beast` number, since 2 + 51 + 8 + 3 + 3 + 79 + 520 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 12680561664 + 12502817856 = 112608^2 + 111816^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (25183379521) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4377606 + ... + 4383354.

Almost surely, 2^25183379520 is an apocalyptic number.

25183379520 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 25183379520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48509777250).

25183379520 is an abundant number, since it is smaller than the sum of its proper divisors (71836174980).

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

25183379520 is a wasteful number, since it uses less digits than its factorization.

25183379520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5804 (or 5772 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 25183379520 in words is "twenty-five billion, one hundred eighty-three million, three hundred seventy-nine thousand, five hundred twenty".