84990551643 has 16 divisors (see below), whose sum is σ = 125917076640. Its totient is φ = 56658051072.

The previous prime is 84990551641. The next prime is 84990551677. The reversal of 84990551643 is 34615509948.

84990551643 is a `hidden beast` number, since 8 + 49 + 9 + 0 + 551 + 6 + 43 = 666.

It is not a de Polignac number, because 84990551643 - 2¹ = 84990551641 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 84990551643.

It is not an unprimeable number, because it can be changed into a prime (84990551641) 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, 838555 + ... + 934427.

It is an arithmetic number, because the mean of its divisors is an integer number (7869817290).

Almost surely, 2^84990551643 is an apocalyptic number.

84990551643 is a deficient number, since it is larger than the sum of its proper divisors (40926524997).

84990551643 is a wasteful number, since it uses less digits than its factorization.

84990551643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128715 (or 128709 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 84990551643 in words is "eighty-four billion, nine hundred ninety million, five hundred fifty-one thousand, six hundred forty-three".