25778450445 has 24 divisors (see below), whose sum is σ = 45335988768. Its totient is φ = 12498641760.

The previous prime is 25778450363. The next prime is 25778450459. The reversal of 25778450445 is 54405487752.

It is not a de Polignac number, because 25778450445 - 2⁸ = 25778450189 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 7099687 + ... + 7103316.

It is an arithmetic number, because the mean of its divisors is an integer number (1888999532).

Almost surely, 2^25778450445 is an apocalyptic number.

It is an amenable number.

25778450445 is a deficient number, since it is larger than the sum of its proper divisors (19557538323).

25778450445 is a wasteful number, since it uses less digits than its factorization.

25778450445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14203033 (or 14203022 counting only the distinct ones).

The product of its (nonzero) digits is 6272000, while the sum is 51.

The spelling of 25778450445 in words is "twenty-five billion, seven hundred seventy-eight million, four hundred fifty thousand, four hundred forty-five".