355124421553 has 4 divisors (see below), whose sum is σ = 387408459888. Its totient is φ = 322840383220.

The previous prime is 355124421541. The next prime is 355124421577.

355124421553 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-355124421553 is a prime.

It is a super-2 number, since 2×355124421553² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355124421523) 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, 16142019151 + ... + 16142019172.

It is an arithmetic number, because the mean of its divisors is an integer number (96852114972).

Almost surely, 2^355124421553 is an apocalyptic number.

It is an amenable number.

355124421553 is a deficient number, since it is larger than the sum of its proper divisors (32284038335).

355124421553 is a wasteful number, since it uses less digits than its factorization.

355124421553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32284038334.

The product of its digits is 360000, while the sum is 40.

It can be divided in two parts, 355124 and 421553, that added together give a palindrome (776677).

The spelling of 355124421553 in words is "three hundred fifty-five billion, one hundred twenty-four million, four hundred twenty-one thousand, five hundred fifty-three".