11515404142 has 32 divisors (see below), whose sum is σ = 18947934720. Its totient is φ = 5205313920.

The previous prime is 11515404133. The next prime is 11515404163. The reversal of 11515404142 is 24140451511.

It is a self number, because there is not a number n which added to its sum of digits gives 11515404142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3690459 + ... + 3693577.

It is an arithmetic number, because the mean of its divisors is an integer number (592122960).

Almost surely, 2^11515404142 is an apocalyptic number.

11515404142 is a deficient number, since it is larger than the sum of its proper divisors (7432530578).

11515404142 is a wasteful number, since it uses less digits than its factorization.

11515404142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4008.

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 11515404142 its reverse (24140451511), we get a palindrome (35655855653).

The spelling of 11515404142 in words is "eleven billion, five hundred fifteen million, four hundred four thousand, one hundred forty-two".