164781867240 has 96 divisors (see below), whose sum is σ = 555375955680. Its totient is φ = 43941828672.

The previous prime is 164781867209. The next prime is 164781867247. The reversal of 164781867240 is 42768187461.

It is a super-2 number, since 2×164781867240² (a number of 23 digits) contains 22 as substring.

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

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

It is not an unprimeable number, because it can be changed into a prime (164781867247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8466714 + ... + 8486153.

It is an arithmetic number, because the mean of its divisors is an integer number (5785166205).

Almost surely, 2^164781867240 is an apocalyptic number.

164781867240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164781867240 is an abundant number, since it is smaller than the sum of its proper divisors (390594088440).

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

164781867240 is a wasteful number, since it uses less digits than its factorization.

164781867240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16952893 (or 16952877 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 164781867240 in words is "one hundred sixty-four billion, seven hundred eighty-one million, eight hundred sixty-seven thousand, two hundred forty".