83121327685693 has 32 divisors (see below), whose sum is σ = 94174177996800. Its totient is φ = 72671811307200.

The previous prime is 83121327685691. The next prime is 83121327685729. The reversal of 83121327685693 is 39658672312138.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 83121327685693 - 2¹ = 83121327685691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83121327685691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 650892978 + ... + 651020668.

It is an arithmetic number, because the mean of its divisors is an integer number (2942943062400).

Almost surely, 2^{83121327685693} is an apocalyptic number.

It is an amenable number.

83121327685693 is a deficient number, since it is larger than the sum of its proper divisors (11052850311107).

83121327685693 is a wasteful number, since it uses less digits than its factorization.

83121327685693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135753.

The product of its digits is 78382080, while the sum is 64.

The spelling of 83121327685693 in words is "eighty-three trillion, one hundred twenty-one billion, three hundred twenty-seven million, six hundred eighty-five thousand, six hundred ninety-three".