164820550 has 24 divisors (see below), whose sum is σ = 307683432. Its totient is φ = 65688000.

The previous prime is 164820529. The next prime is 164820581. The reversal of 164820550 is 55028461.

164820550 = 1234² + 1235² + ... + 1333².

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8185 + ... + 19915.

It is an arithmetic number, because the mean of its divisors is an integer number (12820143).

Almost surely, 2^164820550 is an apocalyptic number.

164820550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164820550 is a deficient number, since it is larger than the sum of its proper divisors (142862882).

164820550 is a wasteful number, since it uses less digits than its factorization.

164820550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12024 (or 12019 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 164820550 is about 12838.2455966538. The cubic root of 164820550 is about 548.2817450278.

The spelling of 164820550 in words is "one hundred sixty-four million, eight hundred twenty thousand, five hundred fifty".