86674756947649 has 4 divisors (see below), whose sum is σ = 93342045943636. Its totient is φ = 80007467951664.

The previous prime is 86674756947643. The next prime is 86674756947739. The reversal of 86674756947649 is 94674965747668.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35812085862400 + 50862671085249 = 5984320^2 + 7131807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86674756947649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86674756947649.

It is not an unprimeable number, because it can be changed into a prime (86674756947643) 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, 3333644497974 + ... + 3333644497999.

It is an arithmetic number, because the mean of its divisors is an integer number (23335511485909).

Almost surely, 2^{86674756947649} is an apocalyptic number.

It is an amenable number.

86674756947649 is a deficient number, since it is larger than the sum of its proper divisors (6667288995987).

86674756947649 is a wasteful number, since it uses less digits than its factorization.

86674756947649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667288995986.

The product of its digits is 92177326080, while the sum is 88.

The spelling of 86674756947649 in words is "eighty-six trillion, six hundred seventy-four billion, seven hundred fifty-six million, nine hundred forty-seven thousand, six hundred forty-nine".