351870816969 has 81 divisors (see below), whose sum is σ = 605092723911. Its totient is φ = 196463534400.

The previous prime is 351870816949. The next prime is 351870817019. The reversal of 351870816969 is 969618078153.

The square root of 351870816969 is 593187.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 295758682569 + 56112134400 = 543837^2 + 236880^2 .

It is not a de Polignac number, because 351870816969 - 2¹⁹ = 351870292681 is a prime.

It is a super-2 number, since 2×351870816969² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (351870816919) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 585475269 + ... + 585475869.

Almost surely, 2^351870816969 is an apocalyptic number.

351870816969 is the 593187-th square number.

351870816969 is the 296594-th centered octagonal number.

It is an amenable number.

351870816969 is a deficient number, since it is larger than the sum of its proper divisors (253221906942).

351870816969 is an frugal number, since it uses more digits than its factorization.

351870816969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 351870816969 in words is "three hundred fifty-one billion, eight hundred seventy million, eight hundred sixteen thousand, nine hundred sixty-nine".