11728652157 has 12 divisors (see below), whose sum is σ = 16951558780. Its totient is φ = 7814406528.

The previous prime is 11728652141. The next prime is 11728652171. The reversal of 11728652157 is 75125682711.

11728652157 is a `hidden beast` number, since 1 + 1 + 72 + 8 + 6 + 521 + 57 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3831486201 + 7897165956 = 61899^2 + 88866^2 .

It is not a de Polignac number, because 11728652157 - 2⁴ = 11728652141 is a prime.

It is a super-2 number, since 2×11728652157² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728652197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 375388 + ... + 405429.

Almost surely, 2^11728652157 is an apocalyptic number.

It is an amenable number.

11728652157 is a deficient number, since it is larger than the sum of its proper divisors (5222906623).

11728652157 is a wasteful number, since it uses less digits than its factorization.

11728652157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782492 (or 782489 counting only the distinct ones).

The product of its digits is 235200, while the sum is 45.

The spelling of 11728652157 in words is "eleven billion, seven hundred twenty-eight million, six hundred fifty-two thousand, one hundred fifty-seven".