351138398986 has 4 divisors (see below), whose sum is σ = 526707598482. Its totient is φ = 175569199492.

The previous prime is 351138398981. The next prime is 351138398987. The reversal of 351138398986 is 689893831153.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689893831153 = 10597 ⋅65102749.

It can be written as a sum of positive squares in only one way, i.e., 288980429761 + 62157969225 = 537569^2 + 249315^2 .

It is not an unprimeable number, because it can be changed into a prime (351138398981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87784599745 + ... + 87784599748.

Almost surely, 2^351138398986 is an apocalyptic number.

351138398986 is a deficient number, since it is larger than the sum of its proper divisors (175569199496).

351138398986 is a wasteful number, since it uses less digits than its factorization.

351138398986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175569199495.

The product of its digits is 33592320, while the sum is 64.

The spelling of 351138398986 in words is "three hundred fifty-one billion, one hundred thirty-eight million, three hundred ninety-eight thousand, nine hundred eighty-six".