25070979889 has 4 divisors (see below), whose sum is σ = 25160200740. Its totient is φ = 24981759040.

The previous prime is 25070979859. The next prime is 25070979971. The reversal of 25070979889 is 98897907052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22668313600 + 2402666289 = 150560^2 + 49017^2 .

It is a cyclic number.

It is not a de Polignac number, because 25070979889 - 2⁹ = 25070979377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25070979889.

It is not an unprimeable number, because it can be changed into a prime (25070979839) 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, 44610004 + ... + 44610565.

It is an arithmetic number, because the mean of its divisors is an integer number (6290050185).

Almost surely, 2^25070979889 is an apocalyptic number.

It is an amenable number.

25070979889 is a deficient number, since it is larger than the sum of its proper divisors (89220851).

25070979889 is an equidigital number, since it uses as much as digits as its factorization.

25070979889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89220850.

The product of its (nonzero) digits is 22861440, while the sum is 64.

The spelling of 25070979889 in words is "twenty-five billion, seventy million, nine hundred seventy-nine thousand, eight hundred eighty-nine".