164231720540 has 48 divisors (see below), whose sum is σ = 347742388224. Its totient is φ = 65150817600.

The previous prime is 164231720509. The next prime is 164231720621. The reversal of 164231720540 is 45027132461.

It is a self number, because there is not a number n which added to its sum of digits gives 164231720540.

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, 1199477 + ... + 1329363.

It is an arithmetic number, because the mean of its divisors is an integer number (7244633088).

Almost surely, 2^164231720540 is an apocalyptic number.

164231720540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164231720540 is an abundant number, since it is smaller than the sum of its proper divisors (183510667684).

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

164231720540 is a wasteful number, since it uses less digits than its factorization.

164231720540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130418 (or 130416 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 164231720540 in words is "one hundred sixty-four billion, two hundred thirty-one million, seven hundred twenty thousand, five hundred forty".