11942562494781 has 24 divisors (see below), whose sum is σ = 17376711089400. Its totient is φ = 7903399021056.

The previous prime is 11942562494773. The next prime is 11942562494791. The reversal of 11942562494781 is 18749426524911.

11942562494781 is a `hidden beast` number, since 1 + 1 + 9 + 4 + 2 + 5 + 62 + 494 + 7 + 81 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3425679037881 + 8516883456900 = 1850859^2 + 2918370^2 .

It is not a de Polignac number, because 11942562494781 - 2³ = 11942562494773 is a prime.

It is a super-2 number, since 2×11942562494781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11942562494741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63890745 + ... + 64077393.

It is an arithmetic number, because the mean of its divisors is an integer number (724029628725).

Almost surely, 2^{11942562494781} is an apocalyptic number.

It is an amenable number.

11942562494781 is a deficient number, since it is larger than the sum of its proper divisors (5434148594619).

11942562494781 is a wasteful number, since it uses less digits than its factorization.

11942562494781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238685 (or 238682 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 11942562494781 in words is "eleven trillion, nine hundred forty-two billion, five hundred sixty-two million, four hundred ninety-four thousand, seven hundred eighty-one".