351087781320 has 256 divisors, whose sum is σ = 1233468000000. Its totient is φ = 88582035456.

The previous prime is 351087781283. The next prime is 351087781321. The reversal of 351087781320 is 23187780153.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (351087781321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16590106 + ... + 16611254.

It is an arithmetic number, because the mean of its divisors is an integer number (4818234375).

Almost surely, 2^351087781320 is an apocalyptic number.

351087781320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 351087781320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616734000000).

351087781320 is an abundant number, since it is smaller than the sum of its proper divisors (882380218680).

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

351087781320 is a wasteful number, since it uses less digits than its factorization.

351087781320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21997 (or 21987 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 351087781320 in words is "three hundred fifty-one billion, eighty-seven million, seven hundred eighty-one thousand, three hundred twenty".