7921656922853 has 4 divisors (see below), whose sum is σ = 8266076789088. Its totient is φ = 7577237056620.

The previous prime is 7921656922841. The next prime is 7921656922909. The reversal of 7921656922853 is 3582296561297.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7921656922853 - 2⁶ = 7921656922789 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 7921656922853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921656922253) 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, 172209933083 + ... + 172209933128.

It is an arithmetic number, because the mean of its divisors is an integer number (2066519197272).

Almost surely, 2^{7921656922853} is an apocalyptic number.

It is an amenable number.

7921656922853 is a deficient number, since it is larger than the sum of its proper divisors (344419866235).

7921656922853 is a wasteful number, since it uses less digits than its factorization.

7921656922853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344419866234.

The product of its digits is 97977600, while the sum is 65.

The spelling of 7921656922853 in words is "seven trillion, nine hundred twenty-one billion, six hundred fifty-six million, nine hundred twenty-two thousand, eight hundred fifty-three".