25490784902 has 16 divisors (see below), whose sum is σ = 43907572800. Its totient is φ = 10976892840.

The previous prime is 25490784887. The next prime is 25490784919. The reversal of 25490784902 is 20948709452.

It is a super-2 number, since 2×25490784902² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30490952 + ... + 30491787.

It is an arithmetic number, because the mean of its divisors is an integer number (2744223300).

Almost surely, 2^25490784902 is an apocalyptic number.

25490784902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25490784902 is a deficient number, since it is larger than the sum of its proper divisors (18416787898).

25490784902 is a wasteful number, since it uses less digits than its factorization.

25490784902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60982771.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 25490784902 in words is "twenty-five billion, four hundred ninety million, seven hundred eighty-four thousand, nine hundred two".