25403319378 has 24 divisors (see below), whose sum is σ = 55053865308. Its totient is φ = 8465720832.

The previous prime is 25403319377. The next prime is 25403319413. The reversal of 25403319378 is 87391330452.

25403319378 is a `hidden beast` number, since 2 + 540 + 3 + 31 + 9 + 3 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21110055849 + 4293263529 = 145293^2 + 65523^2 .

It is not an unprimeable number, because it can be changed into a prime (25403319373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93751 + ... + 244122.

Almost surely, 2^25403319378 is an apocalyptic number.

25403319378 is an abundant number, since it is smaller than the sum of its proper divisors (29650545930).

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

25403319378 is a wasteful number, since it uses less digits than its factorization.

25403319378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342058 (or 342055 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 25403319378 in words is "twenty-five billion, four hundred three million, three hundred nineteen thousand, three hundred seventy-eight".