25105949620 has 24 divisors (see below), whose sum is σ = 52728415488. Its totient is φ = 10041252000.

The previous prime is 25105949593. The next prime is 25105949641. The reversal of 25105949620 is 2694950152.

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, 125305 + ... + 256735.

It is an arithmetic number, because the mean of its divisors is an integer number (2197017312).

Almost surely, 2^25105949620 is an apocalyptic number.

25105949620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25105949620 is an abundant number, since it is smaller than the sum of its proper divisors (27622465868).

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

25105949620 is a wasteful number, since it uses less digits than its factorization.

25105949620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140991 (or 140989 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 25105949620 in words is "twenty-five billion, one hundred five million, nine hundred forty-nine thousand, six hundred twenty".