8722261391764 has 24 divisors (see below), whose sum is σ = 16010039324160. Its totient is φ = 4152980118816.

The previous prime is 8722261391761. The next prime is 8722261391827. The reversal of 8722261391764 is 4671931622278.

It is a junction number, because it is equal to n+sod(n) for n = 8722261391699 and 8722261391708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722261391761) 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, 626952604 + ... + 626966515.

It is an arithmetic number, because the mean of its divisors is an integer number (667084971840).

Almost surely, 2^{8722261391764} is an apocalyptic number.

It is an amenable number.

8722261391764 is a deficient number, since it is larger than the sum of its proper divisors (7287777932396).

8722261391764 is a wasteful number, since it uses less digits than its factorization.

8722261391764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253919207 (or 1253919205 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 58.

The spelling of 8722261391764 in words is "eight trillion, seven hundred twenty-two billion, two hundred sixty-one million, three hundred ninety-one thousand, seven hundred sixty-four".