25360565406 has 64 divisors (see below), whose sum is σ = 56566480896. Its totient is φ = 7513916000.

The previous prime is 25360565341. The next prime is 25360565431. The reversal of 25360565406 is 60456506352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3566851 + ... + 3573953.

It is an arithmetic number, because the mean of its divisors is an integer number (883851264).

Almost surely, 2^25360565406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25360565406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28283240448).

25360565406 is an abundant number, since it is smaller than the sum of its proper divisors (31205915490).

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

25360565406 is a wasteful number, since it uses less digits than its factorization.

25360565406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8317.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 25360565406 in words is "twenty-five billion, three hundred sixty million, five hundred sixty-five thousand, four hundred six".