355056421355 has 4 divisors (see below), whose sum is σ = 426067705632. Its totient is φ = 284045137080.

The previous prime is 355056421351. The next prime is 355056421367. The reversal of 355056421355 is 553124650553.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553124650553 = 31 ⋅17842730663.

It is not a de Polignac number, because 355056421355 - 2² = 355056421351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355056421351) 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, 35505642131 + ... + 35505642140.

It is an arithmetic number, because the mean of its divisors is an integer number (106516926408).

Almost surely, 2^355056421355 is an apocalyptic number.

355056421355 is a deficient number, since it is larger than the sum of its proper divisors (71011284277).

355056421355 is an equidigital number, since it uses as much as digits as its factorization.

355056421355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71011284276.

The product of its (nonzero) digits is 1350000, while the sum is 44.

The spelling of 355056421355 in words is "three hundred fifty-five billion, fifty-six million, four hundred twenty-one thousand, three hundred fifty-five".