181401863555833 has 16 divisors (see below), whose sum is σ = 181868019240960. Its totient is φ = 180936240685200.

The previous prime is 181401863555827. The next prime is 181401863555851. The reversal of 181401863555833 is 338555368104181.

It is a cyclic number.

It is not a de Polignac number, because 181401863555833 - 2²⁵ = 181401830001401 is a prime.

It is a super-2 number, since 2×181401863555833² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181401863556833) 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, 5914427088 + ... + 5914457758.

It is an arithmetic number, because the mean of its divisors is an integer number (11366751202560).

Almost surely, 2^{181401863555833} is an apocalyptic number.

It is an amenable number.

181401863555833 is a deficient number, since it is larger than the sum of its proper divisors (466155685127).

181401863555833 is a wasteful number, since it uses less digits than its factorization.

181401863555833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38868.

The product of its (nonzero) digits is 41472000, while the sum is 61.

The spelling of 181401863555833 in words is "one hundred eighty-one trillion, four hundred one billion, eight hundred sixty-three million, five hundred fifty-five thousand, eight hundred thirty-three".