25618064240 has 80 divisors (see below), whose sum is σ = 62263425600. Its totient is φ = 9784068096.

The previous prime is 25618064237. The next prime is 25618064243. The reversal of 25618064240 is 4246081652.

It is an interprime number because it is at equal distance from previous prime (25618064237) and next prime (25618064243).

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 25618064194 and 25618064203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25618064243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1034726 + ... + 1059194.

It is an arithmetic number, because the mean of its divisors is an integer number (778292820).

Almost surely, 2^25618064240 is an apocalyptic number.

25618064240 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 25618064240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31131712800).

25618064240 is an abundant number, since it is smaller than the sum of its proper divisors (36645361360).

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

25618064240 is a wasteful number, since it uses less digits than its factorization.

25618064240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25074 (or 25068 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 25618064240 in words is "twenty-five billion, six hundred eighteen million, sixty-four thousand, two hundred forty".