164611554072 has 32 divisors (see below), whose sum is σ = 470318726400. Its totient is φ = 47031872544.

The previous prime is 164611554059. The next prime is 164611554091. The reversal of 164611554072 is 270455116461.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489915172 + ... + 489915507.

It is an arithmetic number, because the mean of its divisors is an integer number (14697460200).

Almost surely, 2^164611554072 is an apocalyptic number.

164611554072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

164611554072 is an abundant number, since it is smaller than the sum of its proper divisors (305707172328).

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

164611554072 is a wasteful number, since it uses less digits than its factorization.

164611554072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979830695 (or 979830691 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 164611554072 in words is "one hundred sixty-four billion, six hundred eleven million, five hundred fifty-four thousand, seventy-two".