25902221516 has 6 divisors (see below), whose sum is σ = 45328887660. Its totient is φ = 12951110756.

The previous prime is 25902221503. The next prime is 25902221519. The reversal of 25902221516 is 61512220952.

It is not an unprimeable number, because it can be changed into a prime (25902221519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3237777686 + ... + 3237777693.

It is an arithmetic number, because the mean of its divisors is an integer number (7554814610).

Almost surely, 2^25902221516 is an apocalyptic number.

It is an amenable number.

25902221516 is a deficient number, since it is larger than the sum of its proper divisors (19426666144).

25902221516 is a wasteful number, since it uses less digits than its factorization.

25902221516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6475555383 (or 6475555381 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 25902221516 in words is "twenty-five billion, nine hundred two million, two hundred twenty-one thousand, five hundred sixteen".