25778450446 has 32 divisors (see below), whose sum is σ = 46960178112. Its totient is φ = 10360465920.

The previous prime is 25778450363. The next prime is 25778450459. The reversal of 25778450446 is 64405487752.

It is a junction number, because it is equal to n+sod(n) for n = 25778450393 and 25778450402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129585 + ... + 261436.

It is an arithmetic number, because the mean of its divisors is an integer number (1467505566).

Almost surely, 2^25778450446 is an apocalyptic number.

25778450446 is a deficient number, since it is larger than the sum of its proper divisors (21181727666).

25778450446 is a wasteful number, since it uses less digits than its factorization.

25778450446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391324.

The product of its (nonzero) digits is 7526400, while the sum is 52.

The spelling of 25778450446 in words is "twenty-five billion, seven hundred seventy-eight million, four hundred fifty thousand, four hundred forty-six".