7828881643693 has 16 divisors (see below), whose sum is σ = 9263546933760. Its totient is φ = 6535130099200.

The previous prime is 7828881643663. The next prime is 7828881643711. The reversal of 7828881643693 is 3963461888287.

It is not a de Polignac number, because 7828881643693 - 2²¹ = 7828879546541 is a prime.

It is a super-2 number, since 2×7828881643693² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7828881643633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510549373 + ... + 510564706.

It is an arithmetic number, because the mean of its divisors is an integer number (578971683360).

Almost surely, 2^{7828881643693} is an apocalyptic number.

It is an amenable number.

7828881643693 is a deficient number, since it is larger than the sum of its proper divisors (1434665290067).

7828881643693 is a wasteful number, since it uses less digits than its factorization.

7828881643693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021114148.

The product of its digits is 668860416, while the sum is 73.

The spelling of 7828881643693 in words is "seven trillion, eight hundred twenty-eight billion, eight hundred eighty-one million, six hundred forty-three thousand, six hundred ninety-three".