55857317157443 has 4 divisors (see below), whose sum is σ = 55940314657608. Its totient is φ = 55774319657280.

The previous prime is 55857317157377. The next prime is 55857317157463. The reversal of 55857317157443 is 34475171375855.

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 55857317157443 - 2¹² = 55857317153347 is a prime.

It is a super-2 number, since 2×55857317157443² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55857317157443.

It is not an unprimeable number, because it can be changed into a prime (55857317157463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41498749073 + ... + 41498750418.

It is an arithmetic number, because the mean of its divisors is an integer number (13985078664402).

Almost surely, 2^{55857317157443} is an apocalyptic number.

55857317157443 is a deficient number, since it is larger than the sum of its proper divisors (82997500165).

55857317157443 is an equidigital number, since it uses as much as digits as its factorization.

55857317157443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82997500164.

The product of its digits is 246960000, while the sum is 65.

The spelling of 55857317157443 in words is "fifty-five trillion, eight hundred fifty-seven billion, three hundred seventeen million, one hundred fifty-seven thousand, four hundred forty-three".