164622640842 has 160 divisors (see below), whose sum is σ = 433925553600. Its totient is φ = 46107014400.

The previous prime is 164622640807. The next prime is 164622640849. The reversal of 164622640842 is 248046226461.

164622640842 is a `hidden beast` number, since 16 + 4 + 6 + 226 + 408 + 4 + 2 = 666.

164622640842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×164622640842² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164622640849) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1328884 + ... + 1447472.

It is an arithmetic number, because the mean of its divisors is an integer number (2712034710).

Almost surely, 2^164622640842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164622640842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216962776800).

164622640842 is an abundant number, since it is smaller than the sum of its proper divisors (269302912758).

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

164622640842 is a wasteful number, since it uses less digits than its factorization.

164622640842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118674 (or 118665 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The spelling of 164622640842 in words is "one hundred sixty-four billion, six hundred twenty-two million, six hundred forty thousand, eight hundred forty-two".