351621306056 has 64 divisors (see below), whose sum is σ = 727467955200. Its totient is φ = 158772556800.

The previous prime is 351621306053. The next prime is 351621306059. The reversal of 351621306056 is 650603126153.

It is an interprime number because it is at equal distance from previous prime (351621306053) and next prime (351621306059).

It is not an unprimeable number, because it can be changed into a prime (351621306053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517901 + ... + 985628.

It is an arithmetic number, because the mean of its divisors is an integer number (11366686800).

Almost surely, 2^351621306056 is an apocalyptic number.

It is an amenable number.

351621306056 is an abundant number, since it is smaller than the sum of its proper divisors (375846649144).

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

351621306056 is a wasteful number, since it uses less digits than its factorization.

351621306056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503630 (or 1503626 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 351621306056 in words is "three hundred fifty-one billion, six hundred twenty-one million, three hundred six thousand, fifty-six".