1940764638523 has 8 divisors (see below), whose sum is σ = 1989045952256. Its totient is φ = 1892626381800.

The previous prime is 1940764638521. The next prime is 1940764638539. The reversal of 1940764638523 is 3258364670491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1940764638523 - 2¹ = 1940764638521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1940764638521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35736783 + ... + 35791048.

It is an arithmetic number, because the mean of its divisors is an integer number (248630744032).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1940764638523 = 3881529277046, but 3⋅1940764638523 = 5822293915569 is not.

Almost surely, 2^{1940764638523} is an apocalyptic number.

1940764638523 is a deficient number, since it is larger than the sum of its proper divisors (48281313733).

1940764638523 is an equidigital number, since it uses as much as digits as its factorization.

1940764638523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71528505.

The product of its (nonzero) digits is 26127360, while the sum is 58.

The spelling of 1940764638523 in words is "one trillion, nine hundred forty billion, seven hundred sixty-four million, six hundred thirty-eight thousand, five hundred twenty-three".