26894166243 has 32 divisors (see below), whose sum is σ = 43403060736. Its totient is φ = 14460492288.

The previous prime is 26894166239. The next prime is 26894166251. The reversal of 26894166243 is 34266149862.

It is not a de Polignac number, because 26894166243 - 2² = 26894166239 is a prime.

It is a super-2 number, since 2×26894166243² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (26894166253) 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, 2079505 + ... + 2092397.

It is an arithmetic number, because the mean of its divisors is an integer number (1356345648).

Almost surely, 2^26894166243 is an apocalyptic number.

26894166243 is a deficient number, since it is larger than the sum of its proper divisors (16508894493).

26894166243 is a wasteful number, since it uses less digits than its factorization.

26894166243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18763.

The product of its digits is 2985984, while the sum is 51.

The spelling of 26894166243 in words is "twenty-six billion, eight hundred ninety-four million, one hundred sixty-six thousand, two hundred forty-three".