25878878801 has 4 divisors (see below), whose sum is σ = 25880782704. Its totient is φ = 25876974900.

The previous prime is 25878878761. The next prime is 25878878869. The reversal of 25878878801 is 10887887852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25878878801 - 2⁶ = 25878878737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25878878891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 931415 + ... + 958796.

It is an arithmetic number, because the mean of its divisors is an integer number (6470195676).

Almost surely, 2^25878878801 is an apocalyptic number.

It is an amenable number.

25878878801 is a deficient number, since it is larger than the sum of its proper divisors (1903903).

25878878801 is a wasteful number, since it uses less digits than its factorization.

25878878801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903902.

The product of its (nonzero) digits is 16056320, while the sum is 62.

The spelling of 25878878801 in words is "twenty-five billion, eight hundred seventy-eight million, eight hundred seventy-eight thousand, eight hundred one".