84555381161 has 16 divisors (see below), whose sum is σ = 91116748800. Its totient is φ = 78213274128.

The previous prime is 84555381151. The next prime is 84555381191. The reversal of 84555381161 is 16118355548.

It is not a de Polignac number, because 84555381161 - 2¹⁸ = 84555119017 is a prime.

It is a super-2 number, since 2×84555381161² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84555381151) 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, 261176 + ... + 487158.

It is an arithmetic number, because the mean of its divisors is an integer number (5694796800).

Almost surely, 2^84555381161 is an apocalyptic number.

It is an amenable number.

84555381161 is a deficient number, since it is larger than the sum of its proper divisors (6561367639).

84555381161 is a wasteful number, since it uses less digits than its factorization.

84555381161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226468.

The product of its digits is 576000, while the sum is 47.

The spelling of 84555381161 in words is "eighty-four billion, five hundred fifty-five million, three hundred eighty-one thousand, one hundred sixty-one".