142536661540 has 240 divisors, whose sum is σ = 385296372720. Its totient is φ = 44002344960.

The previous prime is 142536661529. The next prime is 142536661559. The reversal of 142536661540 is 45166635241.

It can be written as a sum of positive squares in 8 ways, for example, as 62156473344 + 80380188196 = 249312^2 + 283514^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 25591876 + ... + 25597444.

It is an arithmetic number, because the mean of its divisors is an integer number (1605401553).

Almost surely, 2^142536661540 is an apocalyptic number.

142536661540 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 142536661540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192648186360).

142536661540 is an abundant number, since it is smaller than the sum of its proper divisors (242759711180).

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

142536661540 is a wasteful number, since it uses less digits than its factorization.

142536661540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5660 (or 5637 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 142536661540 in words is "one hundred forty-two billion, five hundred thirty-six million, six hundred sixty-one thousand, five hundred forty".