11129538501 has 12 divisors (see below), whose sum is σ = 16594581120. Its totient is φ = 7180347240.

The previous prime is 11129538499. The next prime is 11129538509. The reversal of 11129538501 is 10583592111.

11129538501 is a `hidden beast` number, since 1 + 112 + 9 + 5 + 38 + 501 = 666.

It is not a de Polignac number, because 11129538501 - 2¹ = 11129538499 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11129538509) 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, 19945131 + ... + 19945688.

It is an arithmetic number, because the mean of its divisors is an integer number (1382881760).

Almost surely, 2^11129538501 is an apocalyptic number.

It is an amenable number.

11129538501 is a deficient number, since it is larger than the sum of its proper divisors (5465042619).

11129538501 is a wasteful number, since it uses less digits than its factorization.

11129538501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39890856 (or 39890853 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 36.

The spelling of 11129538501 in words is "eleven billion, one hundred twenty-nine million, five hundred thirty-eight thousand, five hundred one".