140731440640 has 160 divisors (see below), whose sum is σ = 386570257920. Its totient is φ = 48133054464.

The previous prime is 140731440611. The next prime is 140731440659. The reversal of 140731440640 is 46044137041.

It is a tau number, because it is divible by the number of its divisors (160).

It is a junction number, because it is equal to n+sod(n) for n = 140731440596 and 140731440605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7499109 + ... + 7517851.

It is an arithmetic number, because the mean of its divisors is an integer number (2416064112).

Almost surely, 2^140731440640 is an apocalyptic number.

140731440640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140731440640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193285128960).

140731440640 is an abundant number, since it is smaller than the sum of its proper divisors (245838817280).

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

140731440640 is an equidigital number, since it uses as much as digits as its factorization.

140731440640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19192 (or 19176 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

Adding to 140731440640 its reverse (46044137041), we get a palindrome (186775577681).

The spelling of 140731440640 in words is "one hundred forty billion, seven hundred thirty-one million, four hundred forty thousand, six hundred forty".