86219544949 has 4 divisors (see below), whose sum is σ = 86524207936. Its totient is φ = 85914881964.

The previous prime is 86219544947. The next prime is 86219544959. The reversal of 86219544949 is 94944591268.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86219544949 - 2¹ = 86219544947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86219544947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152331069 + ... + 152331634.

It is an arithmetic number, because the mean of its divisors is an integer number (21631051984).

Almost surely, 2^86219544949 is an apocalyptic number.

It is an amenable number.

86219544949 is a deficient number, since it is larger than the sum of its proper divisors (304662987).

86219544949 is a wasteful number, since it uses less digits than its factorization.

86219544949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304662986.

The product of its digits is 22394880, while the sum is 61.

The spelling of 86219544949 in words is "eighty-six billion, two hundred nineteen million, five hundred forty-four thousand, nine hundred forty-nine".