11415137428 has 12 divisors (see below), whose sum is σ = 19997816692.
Its totient is φ = 5701475520.
The previous prime is 11415137401. The next prime is 11415137443. The reversal of 11415137428 is 82473151411.
It can be written as a sum of positive squares in 2 ways, for example, as 3688375824 + 7726761604 = 60732^2 + 87902^2
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1519083 + ... + 1526578.
Almost surely, 211415137428 is an apocalyptic number.
It is an amenable number.
11415137428 is a deficient number, since it is larger than the sum of its proper divisors (8582679264).
11415137428 is a wasteful number, since it uses less digits than its factorization.
11415137428 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3046602 (or 3046600 counting only the distinct ones).
The product of its digits is 26880, while the sum is 37.
Adding to 11415137428 its reverse (82473151411), we get a palindrome (93888288839).
The spelling of 11415137428 in words is "eleven billion, four hundred fifteen million, one hundred thirty-seven thousand, four hundred twenty-eight".