163987680417798 has 32 divisors (see below), whose sum is σ = 328319195592960. Its totient is φ = 54605255957280.

The previous prime is 163987680417767. The next prime is 163987680417809. The reversal of 163987680417798 is 897714086789361.

It is a self number, because there is not a number n which added to its sum of digits gives 163987680417798.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 527426248 + ... + 527737076.

It is an arithmetic number, because the mean of its divisors is an integer number (10259974862280).

Almost surely, 2^{163987680417798} is an apocalyptic number.

163987680417798 is an abundant number, since it is smaller than the sum of its proper divisors (164331515175162).

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

163987680417798 is a wasteful number, since it uses less digits than its factorization.

163987680417798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402732.

The product of its (nonzero) digits is 6145155072, while the sum is 84.

The spelling of 163987680417798 in words is "one hundred sixty-three trillion, nine hundred eighty-seven billion, six hundred eighty million, four hundred seventeen thousand, seven hundred ninety-eight".