11728649015 has 4 divisors (see below), whose sum is σ = 14074378824. Its totient is φ = 9382919208.

The previous prime is 11728648973. The next prime is 11728649029. The reversal of 11728649015 is 51094682711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11728649015 - 2⁶ = 11728648951 is a prime.

It is a super-2 number, since 2×11728649015² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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, 1172864897 + ... + 1172864906.

It is an arithmetic number, because the mean of its divisors is an integer number (3518594706).

Almost surely, 2^11728649015 is an apocalyptic number.

11728649015 is a deficient number, since it is larger than the sum of its proper divisors (2345729809).

11728649015 is an equidigital number, since it uses as much as digits as its factorization.

11728649015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345729808.

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 11728649015 in words is "eleven billion, seven hundred twenty-eight million, six hundred forty-nine thousand, fifteen".