25780145994 has 32 divisors (see below), whose sum is σ = 57296010240. Its totient is φ = 8592362496.

The previous prime is 25780145981. The next prime is 25780146001. The reversal of 25780145994 is 49954108752.

It is a happy number.

25780145994 is a `hidden beast` number, since 2 + 578 + 0 + 14 + 59 + 9 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 25780145994.

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, 533194 + ... + 579530.

It is an arithmetic number, because the mean of its divisors is an integer number (1790500320).

Almost surely, 2^25780145994 is an apocalyptic number.

25780145994 is an abundant number, since it is smaller than the sum of its proper divisors (31515864246).

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

25780145994 is a wasteful number, since it uses less digits than its factorization.

25780145994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56651 (or 56645 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 25780145994 in words is "twenty-five billion, seven hundred eighty million, one hundred forty-five thousand, nine hundred ninety-four".