11554405657 has 8 divisors (see below), whose sum is σ = 12235089096. Its totient is φ = 10873834752.

The previous prime is 11554405651. The next prime is 11554405661. The reversal of 11554405657 is 75650445511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1282785856 + 10271619801 = 35816^2 + 101349^2 .

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 11554405657 - 2¹⁹ = 11553881369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11554405651) 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, 279403 + ... + 318079.

It is an arithmetic number, because the mean of its divisors is an integer number (1529386137).

Almost surely, 2^11554405657 is an apocalyptic number.

11554405657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11554405657 is a deficient number, since it is larger than the sum of its proper divisors (680683439).

11554405657 is a wasteful number, since it uses less digits than its factorization.

11554405657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56267.

The product of its (nonzero) digits is 420000, while the sum is 43.

The spelling of 11554405657 in words is "eleven billion, five hundred fifty-four million, four hundred five thousand, six hundred fifty-seven".