25778450476 has 6 divisors (see below), whose sum is σ = 45112288340. Its totient is φ = 12889225236.

The previous prime is 25778450459. The next prime is 25778450491. The reversal of 25778450476 is 67405487752.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222306306 + ... + 3222306313.

Almost surely, 2^25778450476 is an apocalyptic number.

It is an amenable number.

25778450476 is a deficient number, since it is larger than the sum of its proper divisors (19333837864).

25778450476 is a wasteful number, since it uses less digits than its factorization.

25778450476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444612623 (or 6444612621 counting only the distinct ones).

The product of its (nonzero) digits is 13171200, while the sum is 55.

The spelling of 25778450476 in words is "twenty-five billion, seven hundred seventy-eight million, four hundred fifty thousand, four hundred seventy-six".