25700064390 has 576 divisors, whose sum is σ = 92607121152. Its totient is φ = 4860172800.

The previous prime is 25700064361. The next prime is 25700064413. The reversal of 25700064390 is 9346000752.

25700064390 is a `hidden beast` number, since 2 + 5 + 7 + 0 + 0 + 0 + 643 + 9 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 52342045 + ... + 52342535.

It is an arithmetic number, because the mean of its divisors is an integer number (160776252).

Almost surely, 2^25700064390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25700064390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46303560576).

25700064390 is an abundant number, since it is smaller than the sum of its proper divisors (66907056762).

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

25700064390 is a wasteful number, since it uses less digits than its factorization.

25700064390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 25700064390 in words is "twenty-five billion, seven hundred million, sixty-four thousand, three hundred ninety".