83740721442 has 16 divisors (see below), whose sum is σ = 191407363392. Its totient is φ = 23925920400.

The previous prime is 83740721411. The next prime is 83740721473. The reversal of 83740721442 is 24412704738.

It is an interprime number because it is at equal distance from previous prime (83740721411) and next prime (83740721473).

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1993826701 = 83740721442 / (8 + 3 + 7 + 4 + 0 + 7 + 2 + 1 + 4 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 83740721394 and 83740721403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996913309 + ... + 996913392.

It is an arithmetic number, because the mean of its divisors is an integer number (11962960212).

Almost surely, 2^83740721442 is an apocalyptic number.

83740721442 is an abundant number, since it is smaller than the sum of its proper divisors (107666641950).

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

83740721442 is a wasteful number, since it uses less digits than its factorization.

83740721442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993826713.

The product of its (nonzero) digits is 301056, while the sum is 42.

The spelling of 83740721442 in words is "eighty-three billion, seven hundred forty million, seven hundred twenty-one thousand, four hundred forty-two".