83121327685756 has 24 divisors (see below), whose sum is σ = 154019344903200. Its totient is φ = 39115813719552.

The previous prime is 83121327685741. The next prime is 83121327685793. The reversal of 83121327685756 is 65758672312138.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27635545 + ... + 30495343.

It is an arithmetic number, because the mean of its divisors is an integer number (6417472704300).

Almost surely, 2^{83121327685756} is an apocalyptic number.

It is an amenable number.

83121327685756 is a deficient number, since it is larger than the sum of its proper divisors (70898017217444).

83121327685756 is a wasteful number, since it uses less digits than its factorization.

83121327685756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287253 (or 3287251 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 64.

The spelling of 83121327685756 in words is "eighty-three trillion, one hundred twenty-one billion, three hundred twenty-seven million, six hundred eighty-five thousand, seven hundred fifty-six".