11428756081 has 16 divisors (see below), whose sum is σ = 12057477120. Its totient is φ = 10816644240.

The previous prime is 11428755983. The next prime is 11428756093. The reversal of 11428756081 is 18065782411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11428756081 is a prime.

It is a super-2 number, since 2×11428756081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11428756681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2968900 + ... + 2972746.

It is an arithmetic number, because the mean of its divisors is an integer number (753592320).

Almost surely, 2^11428756081 is an apocalyptic number.

It is an amenable number.

11428756081 is a deficient number, since it is larger than the sum of its proper divisors (628721039).

11428756081 is a wasteful number, since it uses less digits than its factorization.

11428756081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5964.

The product of its (nonzero) digits is 107520, while the sum is 43.

The spelling of 11428756081 in words is "eleven billion, four hundred twenty-eight million, seven hundred fifty-six thousand, eighty-one".