11311256542 has 16 divisors (see below), whose sum is σ = 17036538192. Its totient is φ = 5632432960.

The previous prime is 11311256521. The next prime is 11311256557. The reversal of 11311256542 is 24565211311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1306833 + ... + 1315459.

It is an arithmetic number, because the mean of its divisors is an integer number (1064783637).

Almost surely, 2^11311256542 is an apocalyptic number.

11311256542 is a deficient number, since it is larger than the sum of its proper divisors (5725281650).

11311256542 is a wasteful number, since it uses less digits than its factorization.

11311256542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11243.

The product of its digits is 7200, while the sum is 31.

Adding to 11311256542 its reverse (24565211311), we get a palindrome (35876467853).

The spelling of 11311256542 in words is "eleven billion, three hundred eleven million, two hundred fifty-six thousand, five hundred forty-two".