891396367231 has 16 divisors (see below), whose sum is σ = 895258376320. Its totient is φ = 887546419200.

The previous prime is 891396367229. The next prime is 891396367237. The reversal of 891396367231 is 132763693198.

It is a cyclic number.

It is not a de Polignac number, because 891396367231 - 2¹ = 891396367229 is a prime.

It is a super-2 number, since 2×891396367231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891396367237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 626419786 + ... + 626421208.

It is an arithmetic number, because the mean of its divisors is an integer number (55953648520).

Almost surely, 2^891396367231 is an apocalyptic number.

891396367231 is a deficient number, since it is larger than the sum of its proper divisors (3862009089).

891396367231 is a wasteful number, since it uses less digits than its factorization.

891396367231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066.

The product of its digits is 8817984, while the sum is 58.

The spelling of 891396367231 in words is "eight hundred ninety-one billion, three hundred ninety-six million, three hundred sixty-seven thousand, two hundred thirty-one".