11471720057 has 8 divisors (see below), whose sum is σ = 13125735936. Its totient is φ = 9821503872.

The previous prime is 11471720033. The next prime is 11471720077. The reversal of 11471720057 is 75002717411.

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

It is a cyclic number.

It is not a de Polignac number, because 11471720057 - 2¹⁰ = 11471719033 is a prime.

It is a super-2 number, since 2×11471720057² (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 = 11471719999 and 11471720026.

It is not an unprimeable number, because it can be changed into a prime (11471720017) 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, 943448 + ... + 955529.

It is an arithmetic number, because the mean of its divisors is an integer number (1640716992).

Almost surely, 2^11471720057 is an apocalyptic number.

It is an amenable number.

11471720057 is a deficient number, since it is larger than the sum of its proper divisors (1654015879).

11471720057 is an equidigital number, since it uses as much as digits as its factorization.

11471720057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899847.

The product of its (nonzero) digits is 13720, while the sum is 35.

The spelling of 11471720057 in words is "eleven billion, four hundred seventy-one million, seven hundred twenty thousand, fifty-seven".