83700847845 has 24 divisors (see below), whose sum is σ = 153615675096. Its totient is φ = 42014542848.

The previous prime is 83700847843. The next prime is 83700847889. The reversal of 83700847845 is 54874800738.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12253161636 + 71447686209 = 110694^2 + 267297^2 .

It is not a de Polignac number, because 83700847845 - 2¹ = 83700847843 is a prime.

It is a super-2 number, since 2×83700847845² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 83700847791 and 83700847800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83700847843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54705672 + ... + 54707201.

It is an arithmetic number, because the mean of its divisors is an integer number (6400653129).

Almost surely, 2^83700847845 is an apocalyptic number.

83700847845 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

83700847845 is a deficient number, since it is larger than the sum of its proper divisors (69914827251).

83700847845 is a wasteful number, since it uses less digits than its factorization.

83700847845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109412901 (or 109412898 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 54.

The spelling of 83700847845 in words is "eighty-three billion, seven hundred million, eight hundred forty-seven thousand, eight hundred forty-five".