1916777142 has 128 divisors (see below), whose sum is σ = 5015162880. Its totient is φ = 531256320.

The previous prime is 1916777129. The next prime is 1916777143. The reversal of 1916777142 is 2417776191.

It is a super-2 number, since 2×1916777142² = 7348069224187376328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916777143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5222643 + ... + 5223009.

It is an arithmetic number, because the mean of its divisors is an integer number (39180960).

Almost surely, 2^1916777142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1916777142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2507581440).

1916777142 is an abundant number, since it is smaller than the sum of its proper divisors (3098385738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1916777142 is a wasteful number, since it uses less digits than its factorization.

1916777142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 757 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 1916777142 is about 43781.0134875839. The cubic root of 1916777142 is about 1242.1971844969.

The spelling of 1916777142 in words is "one billion, nine hundred sixteen million, seven hundred seventy-seven thousand, one hundred forty-two".