164406450636550 has 12 divisors (see below), whose sum is σ = 305795998184076. Its totient is φ = 65762580254600.

The previous prime is 164406450636511. The next prime is 164406450636559. The reversal of 164406450636550 is 55636054604461.

It is a super-3 number, since 3×164406450636550³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164406450636491 and 164406450636500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164406450636559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1644064506316 + ... + 1644064506415.

It is an arithmetic number, because the mean of its divisors is an integer number (25482999848673).

Almost surely, 2^{164406450636550} is an apocalyptic number.

164406450636550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164406450636550 is a deficient number, since it is larger than the sum of its proper divisors (141389547547526).

164406450636550 is a wasteful number, since it uses less digits than its factorization.

164406450636550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288129012743 (or 3288129012738 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 55.

The spelling of 164406450636550 in words is "one hundred sixty-four trillion, four hundred six billion, four hundred fifty million, six hundred thirty-six thousand, five hundred fifty".