25123920786 has 72 divisors (see below), whose sum is σ = 57438959760. Its totient is φ = 7935338928.

The previous prime is 25123920749. The next prime is 25123920793. The reversal of 25123920786 is 68702932152.

25123920786 is a `hidden beast` number, since 2 + 512 + 39 + 20 + 7 + 86 = 666.

It is a super-2 number, since 2×25123920786² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1006525 + ... + 1031183.

It is an arithmetic number, because the mean of its divisors is an integer number (797763330).

Almost surely, 2^25123920786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25123920786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28719479880).

25123920786 is an abundant number, since it is smaller than the sum of its proper divisors (32315038974).

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

25123920786 is a wasteful number, since it uses less digits than its factorization.

25123920786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24820 (or 24794 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 25123920786 in words is "twenty-five billion, one hundred twenty-three million, nine hundred twenty thousand, seven hundred eighty-six".