163752815640 has 64 divisors (see below), whose sum is σ = 493126444800. Its totient is φ = 43501373312.

The previous prime is 163752815627. The next prime is 163752815641. The reversal of 163752815640 is 46518257361.

It is a self number, because there is not a number n which added to its sum of digits gives 163752815640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163752815641) 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, 2562750 + ... + 2625869.

It is an arithmetic number, because the mean of its divisors is an integer number (7705100700).

Almost surely, 2^163752815640 is an apocalyptic number.

163752815640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163752815640 is an abundant number, since it is smaller than the sum of its proper divisors (329373629160).

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

163752815640 is a wasteful number, since it uses less digits than its factorization.

163752815640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5188896 (or 5188892 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 163752815640 in words is "one hundred sixty-three billion, seven hundred fifty-two million, eight hundred fifteen thousand, six hundred forty".