83742647784 has 32 divisors (see below), whose sum is σ = 209520384000. Its totient is φ = 27892380672.

The previous prime is 83742647783. The next prime is 83742648019. The reversal of 83742647784 is 48774624738.

It is a super-2 number, since 2×83742647784² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83742647783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1333369 + ... + 1394760.

It is an arithmetic number, because the mean of its divisors is an integer number (6547512000).

Almost surely, 2^83742647784 is an apocalyptic number.

It is an amenable number.

83742647784 is an abundant number, since it is smaller than the sum of its proper divisors (125777736216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83742647784 is a wasteful number, since it uses less digits than its factorization.

83742647784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729417 (or 2729413 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 60.

The spelling of 83742647784 in words is "eighty-three billion, seven hundred forty-two million, six hundred forty-seven thousand, seven hundred eighty-four".