345512341215220 has 48 divisors (see below), whose sum is σ = 727478506782720. Its totient is φ = 137842546424576.

The previous prime is 345512341215187. The next prime is 345512341215233. The reversal of 345512341215220 is 22512143215543.

It is a super-2 number, since 2×345512341215220² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 889583784 + ... + 889972096.

It is an arithmetic number, because the mean of its divisors is an integer number (15155802224640).

Almost surely, 2^{345512341215220} is an apocalyptic number.

It is an amenable number.

345512341215220 is an abundant number, since it is smaller than the sum of its proper divisors (381966165567500).

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

345512341215220 is a wasteful number, since it uses less digits than its factorization.

345512341215220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504864 (or 504862 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 345512341215220 in words is "three hundred forty-five trillion, five hundred twelve billion, three hundred forty-one million, two hundred fifteen thousand, two hundred twenty".