11775538542 has 24 divisors (see below), whose sum is σ = 24335308008. Its totient is φ = 3798558960.

The previous prime is 11775538507. The next prime is 11775538543. The reversal of 11775538542 is 24583557711.

It is a junction number, because it is equal to n+sod(n) for n = 11775538491 and 11775538500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11775538543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1015353 + ... + 1026884.

It is an arithmetic number, because the mean of its divisors is an integer number (1013971167).

Almost surely, 2^11775538542 is an apocalyptic number.

11775538542 is an abundant number, since it is smaller than the sum of its proper divisors (12559769466).

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

11775538542 is a wasteful number, since it uses less digits than its factorization.

11775538542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042304 (or 2042273 counting only the distinct ones).

The product of its digits is 1176000, while the sum is 48.

The spelling of 11775538542 in words is "eleven billion, seven hundred seventy-five million, five hundred thirty-eight thousand, five hundred forty-two".