1020131440540 has 12 divisors (see below), whose sum is σ = 2142276025176. Its totient is φ = 408052576208.

The previous prime is 1020131440487. The next prime is 1020131440547. The reversal of 1020131440540 is 450441310201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020131440547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25503285994 + ... + 25503286033.

It is an arithmetic number, because the mean of its divisors is an integer number (178523002098).

Almost surely, 2^{1020131440540} is an apocalyptic number.

1020131440540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020131440540 is an abundant number, since it is smaller than the sum of its proper divisors (1122144584636).

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

1020131440540 is a wasteful number, since it uses less digits than its factorization.

1020131440540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51006572036 (or 51006572034 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 1020131440540 its reverse (450441310201), we get a palindrome (1470572750741).

The spelling of 1020131440540 in words is "one trillion, twenty billion, one hundred thirty-one million, four hundred forty thousand, five hundred forty".