83056056721387 has 4 divisors (see below), whose sum is σ = 83295411352056. Its totient is φ = 82816702090720.

The previous prime is 83056056721357. The next prime is 83056056721403. The reversal of 83056056721387 is 78312765065038.

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

It is a cyclic number.

It is not a de Polignac number, because 83056056721387 - 2⁷ = 83056056721259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83056056721357) 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, 119677314814 + ... + 119677315507.

It is an arithmetic number, because the mean of its divisors is an integer number (20823852838014).

Almost surely, 2^{83056056721387} is an apocalyptic number.

83056056721387 is a deficient number, since it is larger than the sum of its proper divisors (239354630669).

83056056721387 is a wasteful number, since it uses less digits than its factorization.

83056056721387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239354630668.

The product of its (nonzero) digits is 50803200, while the sum is 61.

The spelling of 83056056721387 in words is "eighty-three trillion, fifty-six billion, fifty-six million, seven hundred twenty-one thousand, three hundred eighty-seven".