83511012505 has 8 divisors (see below), whose sum is σ = 100215855432. Its totient is φ = 66807049728.

The previous prime is 83511012503. The next prime is 83511012589. The reversal of 83511012505 is 50521011538.

It can be written as a sum of positive squares in 4 ways, for example, as 20315085961 + 63195926544 = 142531^2 + 251388^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83511012505 - 2¹ = 83511012503 is a prime.

It is a super-2 number, since 2×83511012505² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83511012503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10707 + ... + 408823.

It is an arithmetic number, because the mean of its divisors is an integer number (12526981929).

Almost surely, 2^83511012505 is an apocalyptic number.

It is an amenable number.

83511012505 is a deficient number, since it is larger than the sum of its proper divisors (16704842927).

83511012505 is a wasteful number, since it uses less digits than its factorization.

83511012505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440075.

The product of its (nonzero) digits is 6000, while the sum is 31.

The spelling of 83511012505 in words is "eighty-three billion, five hundred eleven million, twelve thousand, five hundred five".