1078221726165 has 16 divisors (see below), whose sum is σ = 1725207019200. Its totient is φ = 575034168192.

The previous prime is 1078221726163. The next prime is 1078221726193. The reversal of 1078221726165 is 5616271228701.

It is not a de Polignac number, because 1078221726165 - 2¹ = 1078221726163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078221726161) 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, 568995 + ... + 1574864.

It is an arithmetic number, because the mean of its divisors is an integer number (107825438700).

Almost surely, 2^{1078221726165} is an apocalyptic number.

1078221726165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1078221726165 is a deficient number, since it is larger than the sum of its proper divisors (646985293035).

1078221726165 is a wasteful number, since it uses less digits than its factorization.

1078221726165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177396.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 1078221726165 in words is "one trillion, seventy-eight billion, two hundred twenty-one million, seven hundred twenty-six thousand, one hundred sixty-five".