6965041621 has 4 divisors (see below), whose sum is σ = 7205215500. Its totient is φ = 6724867744.

The previous prime is 6965041597. The next prime is 6965041639. The reversal of 6965041621 is 1261405696.

It is a happy number.

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 4091009521 + 2874032100 = 63961^2 + 53610^2 .

It is a cyclic number.

It is not a de Polignac number, because 6965041621 - 2¹⁷ = 6964910549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6965041651) 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, 120086896 + ... + 120086953.

It is an arithmetic number, because the mean of its divisors is an integer number (1801303875).

Almost surely, 2^6965041621 is an apocalyptic number.

It is an amenable number.

6965041621 is a deficient number, since it is larger than the sum of its proper divisors (240173879).

6965041621 is a wasteful number, since it uses less digits than its factorization.

6965041621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240173878.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 6965041621 is about 83456.8248916768. The cubic root of 6965041621 is about 1909.7414396487.

The spelling of 6965041621 in words is "six billion, nine hundred sixty-five million, forty-one thousand, six hundred twenty-one".