83946686549 has 6 divisors (see below), whose sum is σ = 92271977910. Its totient is φ = 76315169480.

The previous prime is 83946686543. The next prime is 83946686573. The reversal of 83946686549 is 94568664938.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 83789986225 + 156700324 = 289465^2 + 12518^2 .

It is not a de Polignac number, because 83946686549 - 2¹⁶ = 83946621013 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 (83946686543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 346887014 + ... + 346887255.

It is an arithmetic number, because the mean of its divisors is an integer number (15378662985).

Almost surely, 2^83946686549 is an apocalyptic number.

It is an amenable number.

83946686549 is a deficient number, since it is larger than the sum of its proper divisors (8325291361).

83946686549 is a wasteful number, since it uses less digits than its factorization.

83946686549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693774291 (or 693774280 counting only the distinct ones).

The product of its digits is 268738560, while the sum is 68.

The spelling of 83946686549 in words is "eighty-three billion, nine hundred forty-six million, six hundred eighty-six thousand, five hundred forty-nine".