351640131646 has 16 divisors (see below), whose sum is σ = 528498983376. Its totient is φ = 175474143936.

The previous prime is 351640131637. The next prime is 351640131673. The reversal of 351640131646 is 646131046153.

It is a junction number, because it is equal to n+sod(n) for n = 351640131599 and 351640131608.

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, 2009265 + ... + 2177251.

It is an arithmetic number, because the mean of its divisors is an integer number (33031186461).

Almost surely, 2^351640131646 is an apocalyptic number.

351640131646 is a deficient number, since it is larger than the sum of its proper divisors (176858851730).

351640131646 is a wasteful number, since it uses less digits than its factorization.

351640131646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170043.

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 351640131646 its reverse (646131046153), we get a palindrome (997771177799).

The spelling of 351640131646 in words is "three hundred fifty-one billion, six hundred forty million, one hundred thirty-one thousand, six hundred forty-six".