25130643240 has 128 divisors (see below), whose sum is σ = 77521276800. Its totient is φ = 6514560000.

The previous prime is 25130643233. The next prime is 25130643247. The reversal of 25130643240 is 4234603152.

It is an interprime number because it is at equal distance from previous prime (25130643233) and next prime (25130643247).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25130643198 and 25130643207.

It is not an unprimeable number, because it can be changed into a prime (25130643247) 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, 675115 + ... + 711365.

It is an arithmetic number, because the mean of its divisors is an integer number (605634975).

Almost surely, 2^25130643240 is an apocalyptic number.

25130643240 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 25130643240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38760638400).

25130643240 is an abundant number, since it is smaller than the sum of its proper divisors (52390633560).

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

25130643240 is a wasteful number, since it uses less digits than its factorization.

25130643240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36427 (or 36423 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 25130643240 in words is "twenty-five billion, one hundred thirty million, six hundred forty-three thousand, two hundred forty".