1942842911881 has 9 divisors (see below), whose sum is σ = 2050507589223. Its totient is φ = 1840562932320.

The previous prime is 1942842911879. The next prime is 1942842911903. The reversal of 1942842911881 is 1881192482491.

The square root of 1942842911881 is 1393859.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1624837145481 + 318005766400 = 1274691^2 + 563920^2 .

It is not a de Polignac number, because 1942842911881 - 2¹ = 1942842911879 is a prime.

It is a super-2 number, since 2×1942842911881² (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 (1942842911831) 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 8 ways as a sum of consecutive naturals, for example, 26446641 + ... + 26520001.

Almost surely, 2^{1942842911881} is an apocalyptic number.

1942842911881 is the 1393859-th square number.

1942842911881 is the 696930-th centered octagonal number.

It is an amenable number.

1942842911881 is a deficient number, since it is larger than the sum of its proper divisors (107664677342).

1942842911881 is an frugal number, since it uses more digits than its factorization.

1942842911881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146760 (or 73380 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 58.

The spelling of 1942842911881 in words is "one trillion, nine hundred forty-two billion, eight hundred forty-two million, nine hundred eleven thousand, eight hundred eighty-one".