216351312498 has 40 divisors (see below), whose sum is σ = 513304100892. Its totient is φ = 67874920704.

The previous prime is 216351312479. The next prime is 216351312571. The reversal of 216351312498 is 894213153612.

216351312498 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 513 + 124 + 9 + 8 = 666.

216351312498 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163420488009 + 52930824489 = 404253^2 + 230067^2 .

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 39276715 + ... + 39282222.

Almost surely, 2^216351312498 is an apocalyptic number.

216351312498 is an abundant number, since it is smaller than the sum of its proper divisors (296952788394).

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

216351312498 is a wasteful number, since it uses less digits than its factorization.

216351312498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78558968 (or 78558959 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 216351312498 in words is "two hundred sixteen billion, three hundred fifty-one million, three hundred twelve thousand, four hundred ninety-eight".