1918792891742 has 4 divisors (see below), whose sum is σ = 2878189337616. Its totient is φ = 959396445870.

The previous prime is 1918792891739. The next prime is 1918792891777. The reversal of 1918792891742 is 2471982978191.

It is a happy number.

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

It is a super-2 number, since 2×1918792891742² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 479698222934 + ... + 479698222937.

It is an arithmetic number, because the mean of its divisors is an integer number (719547334404).

Almost surely, 2^{1918792891742} is an apocalyptic number.

1918792891742 is a deficient number, since it is larger than the sum of its proper divisors (959396445874).

1918792891742 is an equidigital number, since it uses as much as digits as its factorization.

1918792891742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959396445873.

The product of its digits is 36578304, while the sum is 68.

The spelling of 1918792891742 in words is "one trillion, nine hundred eighteen billion, seven hundred ninety-two million, eight hundred ninety-one thousand, seven hundred forty-two".