11728395057 has 8 divisors (see below), whose sum is σ = 15642305440. Its totient is φ = 7816707360.

The previous prime is 11728395053. The next prime is 11728395059. The reversal of 11728395057 is 75059382711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11728395057 - 2² = 11728395053 is a prime.

It is a super-2 number, since 2×11728395057² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11728394997 and 11728395015.

It is not an unprimeable number, because it can be changed into a prime (11728395053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543319 + ... + 564492.

It is an arithmetic number, because the mean of its divisors is an integer number (1955288180).

Almost surely, 2^11728395057 is an apocalyptic number.

It is an amenable number.

11728395057 is a deficient number, since it is larger than the sum of its proper divisors (3913910383).

11728395057 is a wasteful number, since it uses less digits than its factorization.

11728395057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111343.

The product of its (nonzero) digits is 529200, while the sum is 48.

The spelling of 11728395057 in words is "eleven billion, seven hundred twenty-eight million, three hundred ninety-five thousand, fifty-seven".