349313129520 has 40 divisors (see below), whose sum is σ = 1082870702256. Its totient is φ = 93150167808.

The previous prime is 349313129519. The next prime is 349313129527. The reversal of 349313129520 is 25921313943.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (349313129527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727735447 + ... + 727735926.

Almost surely, 2^349313129520 is an apocalyptic number.

349313129520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

349313129520 is an abundant number, since it is smaller than the sum of its proper divisors (733557572736).

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

349313129520 is a wasteful number, since it uses less digits than its factorization.

349313129520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455471389 (or 1455471383 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 42.

The spelling of 349313129520 in words is "three hundred forty-nine billion, three hundred thirteen million, one hundred twenty-nine thousand, five hundred twenty".