8642786081455 has 4 divisors (see below), whose sum is σ = 10371343297752. Its totient is φ = 6914228865160.

The previous prime is 8642786081441. The next prime is 8642786081507. The reversal of 8642786081455 is 5541806872468.

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

It is not a de Polignac number, because 8642786081455 - 2⁷ = 8642786081327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864278608141 + ... + 864278608150.

It is an arithmetic number, because the mean of its divisors is an integer number (2592835824438).

Almost surely, 2^{8642786081455} is an apocalyptic number.

8642786081455 is a deficient number, since it is larger than the sum of its proper divisors (1728557216297).

8642786081455 is a wasteful number, since it uses less digits than its factorization.

8642786081455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728557216296.

The product of its (nonzero) digits is 103219200, while the sum is 64.

The spelling of 8642786081455 in words is "eight trillion, six hundred forty-two billion, seven hundred eighty-six million, eighty-one thousand, four hundred fifty-five".