26121025779 has 32 divisors (see below), whose sum is σ = 37166045184. Its totient is φ = 16281682560.

The previous prime is 26121025771. The next prime is 26121025781. The reversal of 26121025779 is 97752012162.

It is not a de Polignac number, because 26121025779 - 2³ = 26121025771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26121025779.

It is not an unprimeable number, because it can be changed into a prime (26121025771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 977869 + ... + 1004225.

It is an arithmetic number, because the mean of its divisors is an integer number (1161438912).

Almost surely, 2^26121025779 is an apocalyptic number.

26121025779 is a deficient number, since it is larger than the sum of its proper divisors (11045019405).

26121025779 is a wasteful number, since it uses less digits than its factorization.

26121025779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26707.

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 26121025779 in words is "twenty-six billion, one hundred twenty-one million, twenty-five thousand, seven hundred seventy-nine".