25778124478036 has 24 divisors (see below), whose sum is σ = 51556371100416. Its totient is φ = 11047741459680.

The previous prime is 25778124478031. The next prime is 25778124478097. The reversal of 25778124478036 is 63087442187752.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25778124478031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15217326 + ... + 16826266.

It is an arithmetic number, because the mean of its divisors is an integer number (2148182129184).

Almost surely, 2^{25778124478036} is an apocalyptic number.

It is an amenable number.

25778124478036 is an abundant number, since it is smaller than the sum of its proper divisors (25778246622380).

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

25778124478036 is a wasteful number, since it uses less digits than its factorization.

25778124478036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181159 (or 2181157 counting only the distinct ones).

The product of its (nonzero) digits is 126443520, while the sum is 64.

The spelling of 25778124478036 in words is "twenty-five trillion, seven hundred seventy-eight billion, one hundred twenty-four million, four hundred seventy-eight thousand, thirty-six".