26221872786 has 16 divisors (see below), whose sum is σ = 52777784064. Its totient is φ = 8684951184.

The previous prime is 26221872757. The next prime is 26221872797. The reversal of 26221872786 is 68727812262.

It is a super-2 number, since 2×26221872786² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13917250 + ... + 13919133.

It is an arithmetic number, because the mean of its divisors is an integer number (3298611504).

Almost surely, 2^26221872786 is an apocalyptic number.

26221872786 is an abundant number, since it is smaller than the sum of its proper divisors (26555911278).

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

26221872786 is a wasteful number, since it uses less digits than its factorization.

26221872786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27836545.

The product of its digits is 1806336, while the sum is 51.

The spelling of 26221872786 in words is "twenty-six billion, two hundred twenty-one million, eight hundred seventy-two thousand, seven hundred eighty-six".