168140502540 has 48 divisors (see below), whose sum is σ = 523103787360. Its totient is φ = 44837467200.

The previous prime is 168140502529. The next prime is 168140502557. The reversal of 168140502540 is 45205041861.

It is a happy number.

168140502540 is a `hidden beast` number, since 1 + 6 + 8 + 140 + 502 + 5 + 4 + 0 = 666.

168140502540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 168140502495 and 168140502504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155685111 + ... + 155686190.

It is an arithmetic number, because the mean of its divisors is an integer number (10897995570).

Almost surely, 2^168140502540 is an apocalyptic number.

168140502540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168140502540 is an abundant number, since it is smaller than the sum of its proper divisors (354963284820).

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

168140502540 is a wasteful number, since it uses less digits than its factorization.

168140502540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311371319 (or 311371311 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 168140502540 in words is "one hundred sixty-eight billion, one hundred forty million, five hundred two thousand, five hundred forty".