350620170721 has 16 divisors (see below), whose sum is σ = 360720455760. Its totient is φ = 340595153920.

The previous prime is 350620170713. The next prime is 350620170749. The reversal of 350620170721 is 127071026053.

It can be written as a sum of positive squares in 8 ways, for example, as 98681426496 + 251938744225 = 314136^2 + 501935^2 .

It is a cyclic number.

It is not a de Polignac number, because 350620170721 - 2³ = 350620170713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (350620173721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20692965 + ... + 20709901.

It is an arithmetic number, because the mean of its divisors is an integer number (22545028485).

Almost surely, 2^350620170721 is an apocalyptic number.

It is an amenable number.

350620170721 is a deficient number, since it is larger than the sum of its proper divisors (10100285039).

350620170721 is a wasteful number, since it uses less digits than its factorization.

350620170721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19124.

The product of its (nonzero) digits is 17640, while the sum is 34.

Adding to 350620170721 its reverse (127071026053), we get a palindrome (477691196774).

The spelling of 350620170721 in words is "three hundred fifty billion, six hundred twenty million, one hundred seventy thousand, seven hundred twenty-one".