83030720285 has 16 divisors (see below), whose sum is σ = 99757692720. Its totient is φ = 66344087040.

The previous prime is 83030720263. The next prime is 83030720293. The reversal of 83030720285 is 58202703038.

It can be written as a sum of positive squares in 8 ways, for example, as 8467864441 + 74562855844 = 92021^2 + 273062^2 .

It is not a de Polignac number, because 83030720285 - 2²⁶ = 82963611421 is a prime.

It is a super-2 number, since 2×83030720285² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24498371 + ... + 24501759.

It is an arithmetic number, because the mean of its divisors is an integer number (6234855795).

Almost surely, 2^83030720285 is an apocalyptic number.

It is an amenable number.

83030720285 is a deficient number, since it is larger than the sum of its proper divisors (16726972435).

83030720285 is a wasteful number, since it uses less digits than its factorization.

83030720285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7888.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 83030720285 in words is "eighty-three billion, thirty million, seven hundred twenty thousand, two hundred eighty-five".