7721333830013 has 4 divisors (see below), whose sum is σ = 7777693931100. Its totient is φ = 7664973728928.

The previous prime is 7721333830003. The next prime is 7721333830019. The reversal of 7721333830013 is 3100383331277.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4258023996004 + 3463309834009 = 2063498^2 + 1860997^2 .

It is a cyclic number.

It is not a de Polignac number, because 7721333830013 - 2⁴ = 7721333829997 is a prime.

It is a super-2 number, since 2×7721333830013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7721333830019) 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, 28180050338 + ... + 28180050611.

It is an arithmetic number, because the mean of its divisors is an integer number (1944423482775).

Almost surely, 2^{7721333830013} is an apocalyptic number.

It is an amenable number.

7721333830013 is a deficient number, since it is larger than the sum of its proper divisors (56360101087).

7721333830013 is a wasteful number, since it uses less digits than its factorization.

7721333830013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56360101086.

The product of its (nonzero) digits is 190512, while the sum is 41.

The spelling of 7721333830013 in words is "seven trillion, seven hundred twenty-one billion, three hundred thirty-three million, eight hundred thirty thousand, thirteen".