351847221816 has 32 divisors (see below), whose sum is σ = 879964104960. Its totient is φ = 117236267232.

The previous prime is 351847221763. The next prime is 351847221821. The reversal of 351847221816 is 618122748153.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2821450 + ... + 2943513.

It is an arithmetic number, because the mean of its divisors is an integer number (27498878280).

Almost surely, 2^351847221816 is an apocalyptic number.

It is an amenable number.

351847221816 is an abundant number, since it is smaller than the sum of its proper divisors (528116883144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

351847221816 is a wasteful number, since it uses less digits than its factorization.

351847221816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5767515 (or 5767511 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

Adding to 351847221816 its reverse (618122748153), we get a palindrome (969969969969).

The spelling of 351847221816 in words is "three hundred fifty-one billion, eight hundred forty-seven million, two hundred twenty-one thousand, eight hundred sixteen".