25570408842 has 24 divisors (see below), whose sum is σ = 60439148640. Its totient is φ = 7748608680.

The previous prime is 25570408841. The next prime is 25570408961. The reversal of 25570408842 is 24880407552.

It is not an unprimeable number, because it can be changed into a prime (25570408841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64571542 + ... + 64571937.

It is an arithmetic number, because the mean of its divisors is an integer number (2518297860).

Almost surely, 2^25570408842 is an apocalyptic number.

25570408842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25570408842 is an abundant number, since it is smaller than the sum of its proper divisors (34868739798).

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

25570408842 is a wasteful number, since it uses less digits than its factorization.

25570408842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129143498 (or 129143495 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 45.

The spelling of 25570408842 in words is "twenty-five billion, five hundred seventy million, four hundred eight thousand, eight hundred forty-two".