164878825040 has 40 divisors (see below), whose sum is σ = 392258236128. Its totient is φ = 64417772160.

The previous prime is 164878824989. The next prime is 164878825049. The reversal of 164878825040 is 40528878461.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164878825049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23961506 + ... + 23968385.

Almost surely, 2^164878825040 is an apocalyptic number.

164878825040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164878825040 is an abundant number, since it is smaller than the sum of its proper divisors (227379411088).

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

164878825040 is a wasteful number, since it uses less digits than its factorization.

164878825040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47929947 (or 47929941 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 53.

The spelling of 164878825040 in words is "one hundred sixty-four billion, eight hundred seventy-eight million, eight hundred twenty-five thousand, forty".