26217166956 has 12 divisors (see below), whose sum is σ = 61173389592. Its totient is φ = 8739055648.

The previous prime is 26217166949. The next prime is 26217166973. The reversal of 26217166956 is 65966171262.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 26217166899 and 26217166908.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092381945 + ... + 1092381968.

It is an arithmetic number, because the mean of its divisors is an integer number (5097782466).

Almost surely, 2^26217166956 is an apocalyptic number.

It is an amenable number.

26217166956 is an abundant number, since it is smaller than the sum of its proper divisors (34956222636).

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

26217166956 is a wasteful number, since it uses less digits than its factorization.

26217166956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184763920 (or 2184763918 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The spelling of 26217166956 in words is "twenty-six billion, two hundred seventeen million, one hundred sixty-six thousand, nine hundred fifty-six".