164644415616540 has 48 divisors (see below), whose sum is σ = 463551349191840. Its totient is φ = 43662607453440.

The previous prime is 164644415616433. The next prime is 164644415616547. The reversal of 164644415616540 is 45616514446461.

164644415616540 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164644415616547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7580302935 + ... + 7580324654.

It is an arithmetic number, because the mean of its divisors is an integer number (9657319774830).

Almost surely, 2^{164644415616540} is an apocalyptic number.

164644415616540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164644415616540 is an abundant number, since it is smaller than the sum of its proper divisors (298906933575300).

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

164644415616540 is a wasteful number, since it uses less digits than its factorization.

164644415616540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15160627782 (or 15160627780 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 57.

The spelling of 164644415616540 in words is "one hundred sixty-four trillion, six hundred forty-four billion, four hundred fifteen million, six hundred sixteen thousand, five hundred forty".