25670499840 has 480 divisors, whose sum is σ = 92821487616. Its totient is φ = 6549258240.

The previous prime is 25670499823. The next prime is 25670499853. The reversal of 25670499840 is 4899407652.

25670499840 is a `hidden beast` number, since 2 + 5 + 6 + 70 + 499 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90708339 + ... + 90708621.

Almost surely, 2^25670499840 is an apocalyptic number.

25670499840 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 25670499840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46410743808).

25670499840 is an abundant number, since it is smaller than the sum of its proper divisors (67150987776).

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

25670499840 is a wasteful number, since it uses less digits than its factorization.

25670499840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 25670499840 in words is "twenty-five billion, six hundred seventy million, four hundred ninety-nine thousand, eight hundred forty".