22891845861 has 14 divisors (see below), whose sum is σ = 34322069030. Its totient is φ = 15261230088.

The previous prime is 22891845761. The next prime is 22891845883. The reversal of 22891845861 is 16854819822.

It can be written as a sum of positive squares in only one way, i.e., 22885940961 + 5904900 = 151281^2 + 2430^2 .

It is not a de Polignac number, because 22891845861 - 2¹⁵ = 22891813093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22891845798 and 22891845807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22891845761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 15700126 + ... + 15701583.

Almost surely, 2^22891845861 is an apocalyptic number.

It is an amenable number.

22891845861 is a deficient number, since it is larger than the sum of its proper divisors (11430223169).

22891845861 is an frugal number, since it uses more digits than its factorization.

22891845861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31401727 (or 31401712 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The spelling of 22891845861 in words is "twenty-two billion, eight hundred ninety-one million, eight hundred forty-five thousand, eight hundred sixty-one".