345472421646 has 128 divisors (see below), whose sum is σ = 820296253440. Its totient is φ = 95830300800.

The previous prime is 345472421621. The next prime is 345472421659. The reversal of 345472421646 is 646124274543.

It is a junction number, because it is equal to n+sod(n) for n = 345472421595 and 345472421604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26311135 + ... + 26324261.

It is an arithmetic number, because the mean of its divisors is an integer number (6408564480).

Almost surely, 2^345472421646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 345472421646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410148126720).

345472421646 is an abundant number, since it is smaller than the sum of its proper divisors (474823831794).

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

345472421646 is a wasteful number, since it uses less digits than its factorization.

345472421646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13870.

The product of its digits is 3870720, while the sum is 48.

The spelling of 345472421646 in words is "three hundred forty-five billion, four hundred seventy-two million, four hundred twenty-one thousand, six hundred forty-six".