25677925494 has 64 divisors (see below), whose sum is σ = 56635670784. Its totient is φ = 7711272576.

The previous prime is 25677925447. The next prime is 25677925523. The reversal of 25677925494 is 49452977652.

It is a happy number.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6662472 + ... + 6666324.

It is an arithmetic number, because the mean of its divisors is an integer number (884932356).

Almost surely, 2^25677925494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25677925494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28317835392).

25677925494 is an abundant number, since it is smaller than the sum of its proper divisors (30957745290).

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

25677925494 is a wasteful number, since it uses less digits than its factorization.

25677925494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5901.

The product of its digits is 38102400, while the sum is 60.

The spelling of 25677925494 in words is "twenty-five billion, six hundred seventy-seven million, nine hundred twenty-five thousand, four hundred ninety-four".