25321906680 has 128 divisors (see below), whose sum is σ = 88935598080. Its totient is φ = 5646689280.

The previous prime is 25321906661. The next prime is 25321906699. The reversal of 25321906680 is 8660912352.

It is an interprime number because it is at equal distance from previous prime (25321906661) and next prime (25321906699).

It is a Harshad number since it is a multiple of its sum of digits (42).

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 31 ways as a sum of consecutive naturals, for example, 333184 + ... + 402063.

It is an arithmetic number, because the mean of its divisors is an integer number (694809360).

Almost surely, 2^25321906680 is an apocalyptic number.

25321906680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25321906680 is an abundant number, since it is smaller than the sum of its proper divisors (63613691400).

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

25321906680 is a wasteful number, since it uses less digits than its factorization.

25321906680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735309 (or 735305 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 25321906680 in words is "twenty-five billion, three hundred twenty-one million, nine hundred six thousand, six hundred eighty".