25379771085 has 12 divisors (see below), whose sum is σ = 43991603292. Its totient is φ = 13535877888.

The previous prime is 25379771069. The next prime is 25379771089. The reversal of 25379771085 is 58017797352.

It is a happy number.

25379771085 is a `hidden beast` number, since 2 + 537 + 97 + 7 + 10 + 8 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8572722921 + 16807048164 = 92589^2 + 129642^2 .

It is not a de Polignac number, because 25379771085 - 2⁴ = 25379771069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25379771089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 281997412 + ... + 281997501.

It is an arithmetic number, because the mean of its divisors is an integer number (3665966941).

Almost surely, 2^25379771085 is an apocalyptic number.

It is an amenable number.

25379771085 is a deficient number, since it is larger than the sum of its proper divisors (18611832207).

25379771085 is a wasteful number, since it uses less digits than its factorization.

25379771085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563994924 (or 563994921 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 54.

The spelling of 25379771085 in words is "twenty-five billion, three hundred seventy-nine million, seven hundred seventy-one thousand, eighty-five".