84512631921 has 8 divisors (see below), whose sum is σ = 118614220320. Its totient is φ = 53376399072.

The previous prime is 84512631899. The next prime is 84512631937. The reversal of 84512631921 is 12913621548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84512631921 - 2⁷ = 84512631793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84512631941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741338820 + ... + 741338933.

It is an arithmetic number, because the mean of its divisors is an integer number (14826777540).

Almost surely, 2^84512631921 is an apocalyptic number.

It is an amenable number.

84512631921 is a deficient number, since it is larger than the sum of its proper divisors (34101588399).

84512631921 is a wasteful number, since it uses less digits than its factorization.

84512631921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482677775.

The product of its digits is 103680, while the sum is 42.

The spelling of 84512631921 in words is "eighty-four billion, five hundred twelve million, six hundred thirty-one thousand, nine hundred twenty-one".