83129719845 has 32 divisors (see below), whose sum is σ = 136734773760. Its totient is φ = 43095767040.

The previous prime is 83129719843. The next prime is 83129719859. The reversal of 83129719845 is 54891792138.

It is not a de Polignac number, because 83129719845 - 2¹ = 83129719843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83129719843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 504565 + ... + 648725.

It is an arithmetic number, because the mean of its divisors is an integer number (4272961680).

Almost surely, 2^83129719845 is an apocalyptic number.

It is an amenable number.

83129719845 is a deficient number, since it is larger than the sum of its proper divisors (53605053915).

83129719845 is a wasteful number, since it uses less digits than its factorization.

83129719845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145245.

The product of its digits is 4354560, while the sum is 57.

The spelling of 83129719845 in words is "eighty-three billion, one hundred twenty-nine million, seven hundred nineteen thousand, eight hundred forty-five".