1940787957019 has 4 divisors (see below), whose sum is σ = 1940932063440. Its totient is φ = 1940643850600.

The previous prime is 1940787956983. The next prime is 1940787957023. The reversal of 1940787957019 is 9107597870491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1940787957019 - 2¹¹ = 1940787954971 is a prime.

It is a super-2 number, since 2×1940787957019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1940787957919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72033007 + ... + 72059944.

It is an arithmetic number, because the mean of its divisors is an integer number (485233015860).

Almost surely, 2^{1940787957019} is an apocalyptic number.

1940787957019 is a deficient number, since it is larger than the sum of its proper divisors (144106421).

1940787957019 is a wasteful number, since it uses less digits than its factorization.

1940787957019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144106420.

The product of its (nonzero) digits is 40007520, while the sum is 67.

The spelling of 1940787957019 in words is "one trillion, nine hundred forty billion, seven hundred eighty-seven million, nine hundred fifty-seven thousand, nineteen".