351996705623 has 32 divisors (see below), whose sum is σ = 370224691200. Its totient is φ = 334312426240.

The previous prime is 351996705607. The next prime is 351996705629. The reversal of 351996705623 is 326507699153.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 351996705623 - 2⁴ = 351996705607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351996705629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 539045165 + ... + 539045817.

It is an arithmetic number, because the mean of its divisors is an integer number (11569521600).

Almost surely, 2^351996705623 is an apocalyptic number.

351996705623 is a deficient number, since it is larger than the sum of its proper divisors (18227985577).

351996705623 is a wasteful number, since it uses less digits than its factorization.

351996705623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807.

The product of its (nonzero) digits is 9185400, while the sum is 56.

The spelling of 351996705623 in words is "three hundred fifty-one billion, nine hundred ninety-six million, seven hundred five thousand, six hundred twenty-three".