355772940689281 has 4 divisors (see below), whose sum is σ = 356206281665364. Its totient is φ = 355339599713200.

The previous prime is 355772940689279. The next prime is 355772940689291. The reversal of 355772940689281 is 182986049277553.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91937241968881 + 263835698720400 = 9588391^2 + 16243020^2 .

It is a cyclic number.

It is not a de Polignac number, because 355772940689281 - 2¹ = 355772940689279 is a prime.

It is a super-2 number, since 2×355772940689281² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 355772940689198 and 355772940689207.

It is not an unprimeable number, because it can be changed into a prime (355772940689291) 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, 216670486810 + ... + 216670488451.

It is an arithmetic number, because the mean of its divisors is an integer number (89051570416341).

It is a 1-persistent number, because it is pandigital, but 2⋅355772940689281 = 711545881378562 is not.

Almost surely, 2^{355772940689281} is an apocalyptic number.

It is an amenable number.

355772940689281 is a deficient number, since it is larger than the sum of its proper divisors (433340976083).

355772940689281 is an equidigital number, since it uses as much as digits as its factorization.

355772940689281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433340976082.

The product of its (nonzero) digits is 1828915200, while the sum is 76.

The spelling of 355772940689281 in words is "three hundred fifty-five trillion, seven hundred seventy-two billion, nine hundred forty million, six hundred eighty-nine thousand, two hundred eighty-one".