25445032620 has 72 divisors (see below), whose sum is σ = 82878115824. Its totient is φ = 5816006784.

The previous prime is 25445032609. The next prime is 25445032637. The reversal of 25445032620 is 2623054452.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4324447 + ... + 4330326.

It is an arithmetic number, because the mean of its divisors is an integer number (1151084942).

Almost surely, 2^25445032620 is an apocalyptic number.

25445032620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25445032620 is an abundant number, since it is smaller than the sum of its proper divisors (57433083204).

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

25445032620 is a wasteful number, since it uses less digits than its factorization.

25445032620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8654799 (or 8654790 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

The spelling of 25445032620 in words is "twenty-five billion, four hundred forty-five million, thirty-two thousand, six hundred twenty".