84188690531 has 4 divisors (see below), whose sum is σ = 91842207864. Its totient is φ = 76535173200.

The previous prime is 84188690447. The next prime is 84188690539. The reversal of 84188690531 is 13509688148.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84188690531 - 2¹⁴ = 84188674147 is a prime.

It is a super-2 number, since 2×84188690531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84188690539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3826758650 + ... + 3826758671.

It is an arithmetic number, because the mean of its divisors is an integer number (22960551966).

Almost surely, 2^84188690531 is an apocalyptic number.

84188690531 is a deficient number, since it is larger than the sum of its proper divisors (7653517333).

84188690531 is a wasteful number, since it uses less digits than its factorization.

84188690531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7653517332.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 84188690531 in words is "eighty-four billion, one hundred eighty-eight million, six hundred ninety thousand, five hundred thirty-one".