1781142916 has 24 divisors (see below), whose sum is σ = 3749775680. Its totient is φ = 723170592.

The previous prime is 1781142911. The next prime is 1781142929. The reversal of 1781142916 is 6192411871.

It is not an unprimeable number, because it can be changed into a prime (1781142911) 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, 1673475 + ... + 1674538.

Almost surely, 2^1781142916 is an apocalyptic number.

It is an amenable number.

1781142916 is an abundant number, since it is smaller than the sum of its proper divisors (1968632764).

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

1781142916 is a wasteful number, since it uses less digits than its factorization.

1781142916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348043 (or 3348041 counting only the distinct ones).

The product of its digits is 24192, while the sum is 40.

The square root of 1781142916 is about 42203.5888995237. The cubic root of 1781142916 is about 1212.1776045247.

The spelling of 1781142916 in words is "one billion, seven hundred eighty-one million, one hundred forty-two thousand, nine hundred sixteen".