7266721823861 has 8 divisors (see below), whose sum is σ = 7702100037504. Its totient is φ = 6832224053440.

The previous prime is 7266721823813. The next prime is 7266721823887. The reversal of 7266721823861 is 1683281276627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7266721823861 - 2²² = 7266717629557 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 7266721823861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7266721820861) 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, 220093805 + ... + 220126818.

It is an arithmetic number, because the mean of its divisors is an integer number (962762504688).

Almost surely, 2^{7266721823861} is an apocalyptic number.

It is an amenable number.

7266721823861 is a deficient number, since it is larger than the sum of its proper divisors (435378213643).

7266721823861 is a wasteful number, since it uses less digits than its factorization.

7266721823861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440221611.

The product of its digits is 16257024, while the sum is 59.

The spelling of 7266721823861 in words is "seven trillion, two hundred sixty-six billion, seven hundred twenty-one million, eight hundred twenty-three thousand, eight hundred sixty-one".