83977175581 has 32 divisors (see below), whose sum is σ = 96726712320. Its totient is φ = 72314472384.

The previous prime is 83977175539. The next prime is 83977175609. The reversal of 83977175581 is 18557177938.

It is a cyclic number.

It is not a de Polignac number, because 83977175581 - 2⁷ = 83977175453 is a prime.

It is a super-2 number, since 2×83977175581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83977170581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2221666 + ... + 2259148.

It is an arithmetic number, because the mean of its divisors is an integer number (3022709760).

Almost surely, 2^83977175581 is an apocalyptic number.

It is an amenable number.

83977175581 is a deficient number, since it is larger than the sum of its proper divisors (12749536739).

83977175581 is a wasteful number, since it uses less digits than its factorization.

83977175581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37705.

The product of its digits is 14817600, while the sum is 61.

The spelling of 83977175581 in words is "eighty-three billion, nine hundred seventy-seven million, one hundred seventy-five thousand, five hundred eighty-one".