164781743742 has 64 divisors (see below), whose sum is σ = 456538176000. Its totient is φ = 42800451840.

The previous prime is 164781743701. The next prime is 164781743771. The reversal of 164781743742 is 247347187461.

It is a happy number.

164781743742 is a `hidden beast` number, since 164 + 7 + 8 + 1 + 7 + 437 + 42 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19810867 + ... + 19819182.

It is an arithmetic number, because the mean of its divisors is an integer number (7133409000).

Almost surely, 2^164781743742 is an apocalyptic number.

164781743742 is an abundant number, since it is smaller than the sum of its proper divisors (291756432258).

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

164781743742 is a wasteful number, since it uses less digits than its factorization.

164781743742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39630078 (or 39630072 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 54.

The spelling of 164781743742 in words is "one hundred sixty-four billion, seven hundred eighty-one million, seven hundred forty-three thousand, seven hundred forty-two".