83121374115077 has 4 divisors (see below), whose sum is σ = 83122363115340. Its totient is φ = 83120385114816.

The previous prime is 83121374115067. The next prime is 83121374115151. The reversal of 83121374115077 is 77051147312138.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57083479840321 + 26037894274756 = 7555361^2 + 5102734^2 .

It is a cyclic number.

It is not a de Polignac number, because 83121374115077 - 2⁴ = 83121374115061 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 (83121374115067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494374052 + ... + 494542157.

It is an arithmetic number, because the mean of its divisors is an integer number (20780590778835).

Almost surely, 2^{83121374115077} is an apocalyptic number.

It is an amenable number.

83121374115077 is a deficient number, since it is larger than the sum of its proper divisors (989000263).

83121374115077 is an equidigital number, since it uses as much as digits as its factorization.

83121374115077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989000262.

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 83121374115077 in words is "eighty-three trillion, one hundred twenty-one billion, three hundred seventy-four million, one hundred fifteen thousand, seventy-seven".