140642455540 has 96 divisors (see below), whose sum is σ = 324381214080. Its totient is φ = 51007574016.

The previous prime is 140642455531. The next prime is 140642455543. The reversal of 140642455540 is 45554246041.

It is a junction number, because it is equal to n+sod(n) for n = 140642455493 and 140642455502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140642455543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1001371 + ... + 1133149.

It is an arithmetic number, because the mean of its divisors is an integer number (3378970980).

Almost surely, 2^140642455540 is an apocalyptic number.

140642455540 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 140642455540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162190607040).

140642455540 is an abundant number, since it is smaller than the sum of its proper divisors (183738758540).

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

140642455540 is a wasteful number, since it uses less digits than its factorization.

140642455540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131921 (or 131919 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 40.

The spelling of 140642455540 in words is "one hundred forty billion, six hundred forty-two million, four hundred fifty-five thousand, five hundred forty".