8201978743 has 16 divisors (see below), whose sum is σ = 9492215040. Its totient is φ = 6941474496.

The previous prime is 8201978723. The next prime is 8201978747. The reversal of 8201978743 is 3478791028.

It is a cyclic number.

It is not a de Polignac number, because 8201978743 - 2⁵ = 8201978711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8201978747) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1378068 + ... + 1384006.

It is an arithmetic number, because the mean of its divisors is an integer number (593263440).

Almost surely, 2^8201978743 is an apocalyptic number.

8201978743 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

8201978743 is a deficient number, since it is larger than the sum of its proper divisors (1290236297).

8201978743 is a wasteful number, since it uses less digits than its factorization.

8201978743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8406.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 8201978743 is about 90564.7765027883. The cubic root of 8201978743 is about 2016.6918651801.

The spelling of 8201978743 in words is "eight billion, two hundred one million, nine hundred seventy-eight thousand, seven hundred forty-three".