11717221557 has 8 divisors (see below), whose sum is σ = 15636308320. Its totient is φ = 7804807920.

The previous prime is 11717221553. The next prime is 11717221561. The reversal of 11717221557 is 75512271711.

It is an interprime number because it is at equal distance from previous prime (11717221553) and next prime (11717221561).

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

It is not a de Polignac number, because 11717221557 - 2² = 11717221553 is a prime.

It is a super-3 number, since 3×11717221557³ (a number of 31 digits) contains 333 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 (11717221553) 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 7 ways as a sum of consecutive naturals, for example, 1664182 + ... + 1671207.

It is an arithmetic number, because the mean of its divisors is an integer number (1954538540).

Almost surely, 2^11717221557 is an apocalyptic number.

It is an amenable number.

11717221557 is a deficient number, since it is larger than the sum of its proper divisors (3919086763).

11717221557 is a wasteful number, since it uses less digits than its factorization.

11717221557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336563.

The product of its digits is 34300, while the sum is 39.

The spelling of 11717221557 in words is "eleven billion, seven hundred seventeen million, two hundred twenty-one thousand, five hundred fifty-seven".