25400775630 has 64 divisors (see below), whose sum is σ = 61294060800. Its totient is φ = 6736694784.

The previous prime is 25400775557. The next prime is 25400775643. The reversal of 25400775630 is 3657700452.

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, 12100321 + ... + 12102419.

It is an arithmetic number, because the mean of its divisors is an integer number (957719700).

Almost surely, 2^25400775630 is an apocalyptic number.

25400775630 is an abundant number, since it is smaller than the sum of its proper divisors (35893285170).

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

25400775630 is a wasteful number, since it uses less digits than its factorization.

25400775630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113.

The product of its (nonzero) digits is 176400, while the sum is 39.

The spelling of 25400775630 in words is "twenty-five billion, four hundred million, seven hundred seventy-five thousand, six hundred thirty".