1355976081517 has 4 divisors (see below), whose sum is σ = 1369955216476. Its totient is φ = 1341996946560.

The previous prime is 1355976081461. The next prime is 1355976081527. The reversal of 1355976081517 is 7151806795531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 797281124836 + 558694956681 = 892906^2 + 747459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1355976081517 is a prime.

It is a super-2 number, since 2×1355976081517² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355976081527) 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, 6989567334 + ... + 6989567527.

It is an arithmetic number, because the mean of its divisors is an integer number (342488804119).

Almost surely, 2^{1355976081517} is an apocalyptic number.

It is an amenable number.

1355976081517 is a deficient number, since it is larger than the sum of its proper divisors (13979134959).

1355976081517 is an equidigital number, since it uses as much as digits as its factorization.

1355976081517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13979134958.

The product of its (nonzero) digits is 7938000, while the sum is 58.

The spelling of 1355976081517 in words is "one trillion, three hundred fifty-five billion, nine hundred seventy-six million, eighty-one thousand, five hundred seventeen".