83740780505 has 16 divisors (see below), whose sum is σ = 106427623680. Its totient is φ = 63035542272.

The previous prime is 83740780483. The next prime is 83740780549. The reversal of 83740780505 is 50508704738.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 83740780505 - 2³⁶ = 15021303769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83740780505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207422 + ... + 458808.

It is an arithmetic number, because the mean of its divisors is an integer number (6651726480).

Almost surely, 2^83740780505 is an apocalyptic number.

83740780505 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

83740780505 is a deficient number, since it is larger than the sum of its proper divisors (22686843175).

83740780505 is a wasteful number, since it uses less digits than its factorization.

83740780505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255328.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 83740780505 in words is "eighty-three billion, seven hundred forty million, seven hundred eighty thousand, five hundred five".