84467720891 has 8 divisors (see below), whose sum is σ = 86055103200. Its totient is φ = 82891968192.

The previous prime is 84467720879. The next prime is 84467720917. The reversal of 84467720891 is 19802776448.

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

It is a cyclic number.

It is not a de Polignac number, because 84467720891 - 2²⁶ = 84400612027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84467722891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2892740 + ... + 2921793.

It is an arithmetic number, because the mean of its divisors is an integer number (10756887900).

Almost surely, 2^84467720891 is an apocalyptic number.

84467720891 is a deficient number, since it is larger than the sum of its proper divisors (1587382309).

84467720891 is a wasteful number, since it uses less digits than its factorization.

84467720891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5814805.

The product of its (nonzero) digits is 5419008, while the sum is 56.

It can be divided in two parts, 844677 and 20891, that added together give a palindrome (865568).

The spelling of 84467720891 in words is "eighty-four billion, four hundred sixty-seven million, seven hundred twenty thousand, eight hundred ninety-one".