25434646680 has 128 divisors (see below), whose sum is σ = 76702464000. Its totient is φ = 6747267072.

The previous prime is 25434646621. The next prime is 25434646691. The reversal of 25434646680 is 8664643452.

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, 29471929 + ... + 29472791.

It is an arithmetic number, because the mean of its divisors is an integer number (599238000).

Almost surely, 2^25434646680 is an apocalyptic number.

25434646680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25434646680 is an abundant number, since it is smaller than the sum of its proper divisors (51267817320).

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

25434646680 is a wasteful number, since it uses less digits than its factorization.

25434646680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1869 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 25434646680 in words is "twenty-five billion, four hundred thirty-four million, six hundred forty-six thousand, six hundred eighty".