168140503902 has 64 divisors (see below), whose sum is σ = 390744267264. Its totient is φ = 47241169920.

The previous prime is 168140503901. The next prime is 168140503903. The reversal of 168140503902 is 209305041861.

It is an interprime number because it is at equal distance from previous prime (168140503901) and next prime (168140503903).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168140503901) by changing a digit.

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, 951877 + ... + 1114607.

It is an arithmetic number, because the mean of its divisors is an integer number (6105379176).

Almost surely, 2^168140503902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168140503902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195372133632).

168140503902 is an abundant number, since it is smaller than the sum of its proper divisors (222603763362).

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

168140503902 is a wasteful number, since it uses less digits than its factorization.

168140503902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163153.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 168140503902 in words is "one hundred sixty-eight billion, one hundred forty million, five hundred three thousand, nine hundred two".