89991728763 has 16 divisors (see below), whose sum is σ = 126318641280.
Its totient is φ = 56830374144.
The previous prime is 89991728759. The next prime is 89991728773. The reversal of 89991728763 is 36782719998.
It is not a de Polignac number, because 89991728763 - 22 = 89991728759 is a prime.
It is a super-2 number, since 2×899917287632 (a number of 23 digits) contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (89991728773) 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, 438795 + ... + 610347.
It is an arithmetic number, because the mean of its divisors is an integer number (7894915080).
Almost surely, 289991728763 is an apocalyptic number.
89991728763 is a deficient number, since it is larger than the sum of its proper divisors (36326912517).
89991728763 is a wasteful number, since it uses less digits than its factorization.
89991728763 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 180778.
The product of its digits is 82301184, while the sum is 69.
The spelling of 89991728763 in words is "eighty-nine billion, nine hundred ninety-one million, seven hundred twenty-eight thousand, seven hundred sixty-three".