291116888233563 has 64 divisors (see below), whose sum is σ = 485812868218880. Its totient is φ = 151312441392000.

The previous prime is 291116888233537. The next prime is 291116888233571. The reversal of 291116888233563 is 365332888611192.

It is not a de Polignac number, because 291116888233563 - 2⁵ = 291116888233531 is a prime.

It is a super-2 number, since 2×291116888233563² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 291116888233494 and 291116888233503.

It is not an unprimeable number, because it can be changed into a prime (291116888234563) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 91090588 + ... + 94232313.

It is an arithmetic number, because the mean of its divisors is an integer number (7590826065920).

Almost surely, 2^{291116888233563} is an apocalyptic number.

291116888233563 is a deficient number, since it is larger than the sum of its proper divisors (194695979985317).

291116888233563 is a wasteful number, since it uses less digits than its factorization.

291116888233563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185323088.

The product of its digits is 89579520, while the sum is 66.

The spelling of 291116888233563 in words is "two hundred ninety-one trillion, one hundred sixteen billion, eight hundred eighty-eight million, two hundred thirty-three thousand, five hundred sixty-three".