1355342332581 has 6 divisors (see below), whose sum is σ = 1957716702630. Its totient is φ = 903561555048.

The previous prime is 1355342332483. The next prime is 1355342332621. The reversal of 1355342332581 is 1852332435531.

1355342332581 is a `hidden beast` number, since 1 + 3 + 5 + 5 + 34 + 2 + 3 + 32 + 581 = 666.

It can be written as a sum of positive squares in only one way, i.e., 957129588900 + 398212743681 = 978330^2 + 631041^2 .

It is not a de Polignac number, because 1355342332581 - 2⁷ = 1355342332453 is a prime.

It is a super-2 number, since 2×1355342332581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355342332481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75296796246 + ... + 75296796263.

It is an arithmetic number, because the mean of its divisors is an integer number (326286117105).

Almost surely, 2^{1355342332581} is an apocalyptic number.

It is an amenable number.

1355342332581 is a deficient number, since it is larger than the sum of its proper divisors (602374370049).

1355342332581 is a wasteful number, since it uses less digits than its factorization.

1355342332581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150593592515 (or 150593592512 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 1355342332581 in words is "one trillion, three hundred fifty-five billion, three hundred forty-two million, three hundred thirty-two thousand, five hundred eighty-one".