1355355731540 has 24 divisors (see below), whose sum is σ = 2847564224232. Its totient is φ = 541891399680.

The previous prime is 1355355731533. The next prime is 1355355731551. The reversal of 1355355731540 is 451375535531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 506326172356 + 849029559184 = 711566^2 + 921428^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15636509 + ... + 15722948.

It is an arithmetic number, because the mean of its divisors is an integer number (118648509343).

Almost surely, 2^{1355355731540} is an apocalyptic number.

1355355731540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1355355731540 is an abundant number, since it is smaller than the sum of its proper divisors (1492208492692).

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

1355355731540 is a wasteful number, since it uses less digits than its factorization.

1355355731540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31361627 (or 31361625 counting only the distinct ones).

The product of its (nonzero) digits is 2362500, while the sum is 47.

The spelling of 1355355731540 in words is "one trillion, three hundred fifty-five billion, three hundred fifty-five million, seven hundred thirty-one thousand, five hundred forty".