83791561385 has 24 divisors (see below), whose sum is σ = 116986161600. Its totient is φ = 57447255264.

The previous prime is 83791561351. The next prime is 83791561387. The reversal of 83791561385 is 58316519738.

It is not a de Polignac number, because 83791561385 - 2¹⁴ = 83791545001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83791561385.

It is not an unprimeable number, because it can be changed into a prime (83791561387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1590842 + ... + 1642668.

It is an arithmetic number, because the mean of its divisors is an integer number (4874423400).

Almost surely, 2^83791561385 is an apocalyptic number.

It is an amenable number.

83791561385 is a deficient number, since it is larger than the sum of its proper divisors (33194600215).

83791561385 is a wasteful number, since it uses less digits than its factorization.

83791561385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58445 (or 58438 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 56.

The spelling of 83791561385 in words is "eighty-three billion, seven hundred ninety-one million, five hundred sixty-one thousand, three hundred eighty-five".