164815398550 has 96 divisors (see below), whose sum is σ = 338509476864. Its totient is φ = 59204544000.

The previous prime is 164815398541. The next prime is 164815398571. The reversal of 164815398550 is 55893518461.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a junction number, because it is equal to n+sod(n) for n = 164815398491 and 164815398500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19324387 + ... + 19332913.

It is an arithmetic number, because the mean of its divisors is an integer number (3526140384).

Almost surely, 2^164815398550 is an apocalyptic number.

164815398550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164815398550 is an abundant number, since it is smaller than the sum of its proper divisors (173694078314).

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

164815398550 is a wasteful number, since it uses less digits than its factorization.

164815398550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8974 (or 8969 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 55.

It can be divided in two parts, 164815 and 398550, that added together give a palindrome (563365).

The spelling of 164815398550 in words is "one hundred sixty-four billion, eight hundred fifteen million, three hundred ninety-eight thousand, five hundred fifty".