355072109309 has 4 divisors (see below), whose sum is σ = 363732404700. Its totient is φ = 346411813920.

The previous prime is 355072109303. The next prime is 355072109321. The reversal of 355072109309 is 903901270553.

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 50379149209 + 304692960100 = 224453^2 + 551990^2 .

It is a cyclic number.

It is not a de Polignac number, because 355072109309 - 2²⁰ = 355071060733 is a prime.

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 355072109309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355072109303) 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, 4330147634 + ... + 4330147715.

It is an arithmetic number, because the mean of its divisors is an integer number (90933101175).

Almost surely, 2^355072109309 is an apocalyptic number.

It is an amenable number.

355072109309 is a deficient number, since it is larger than the sum of its proper divisors (8660295391).

355072109309 is an equidigital number, since it uses as much as digits as its factorization.

355072109309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8660295390.

The product of its (nonzero) digits is 255150, while the sum is 44.

The spelling of 355072109309 in words is "three hundred fifty-five billion, seventy-two million, one hundred nine thousand, three hundred nine".