25778806376 has 8 divisors (see below), whose sum is σ = 48335261970. Its totient is φ = 12889403184.

The previous prime is 25778806373. The next prime is 25778806379. The reversal of 25778806376 is 67360887752.

It is an interprime number because it is at equal distance from previous prime (25778806373) and next prime (25778806379).

It can be written as a sum of positive squares in only one way, i.e., 25093728100 + 685078276 = 158410^2 + 26174^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (25778806373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611175391 + ... + 1611175406.

Almost surely, 2^25778806376 is an apocalyptic number.

It is an amenable number.

25778806376 is a deficient number, since it is larger than the sum of its proper divisors (22556455594).

25778806376 is a wasteful number, since it uses less digits than its factorization.

25778806376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222350803 (or 3222350799 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 59.

The spelling of 25778806376 in words is "twenty-five billion, seven hundred seventy-eight million, eight hundred six thousand, three hundred seventy-six".