83810344545 has 64 divisors (see below), whose sum is σ = 153982080000. Its totient is φ = 43222394880.

The previous prime is 83810344543. The next prime is 83810344547. The reversal of 83810344545 is 54544301838.

It is an interprime number because it is at equal distance from previous prime (83810344543) and next prime (83810344547).

It is not a de Polignac number, because 83810344545 - 2¹ = 83810344543 is a prime.

It is a super-2 number, since 2×83810344545² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 83810344545.

It is not an unprimeable number, because it can be changed into a prime (83810344543) 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 63 ways as a sum of consecutive naturals, for example, 558456 + ... + 692454.

It is an arithmetic number, because the mean of its divisors is an integer number (2405970000).

Almost surely, 2^83810344545 is an apocalyptic number.

It is an amenable number.

83810344545 is a deficient number, since it is larger than the sum of its proper divisors (70171735455).

83810344545 is a wasteful number, since it uses less digits than its factorization.

83810344545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134167 (or 134161 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 83810344545 in words is "eighty-three billion, eight hundred ten million, three hundred forty-four thousand, five hundred forty-five".