1356012473681 has 4 divisors (see below), whose sum is σ = 1356042707892. Its totient is φ = 1355982239472.

The previous prime is 1356012473671. The next prime is 1356012473687. The reversal of 1356012473681 is 1863742106531.

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 204651283456 + 1151361190225 = 452384^2 + 1073015^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356012473681 - 2⁶ = 1356012473617 is a prime.

It is a super-2 number, since 2×1356012473681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356012473687) 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, 15049730 + ... + 15139563.

It is an arithmetic number, because the mean of its divisors is an integer number (339010676973).

Almost surely, 2^{1356012473681} is an apocalyptic number.

It is an amenable number.

1356012473681 is a deficient number, since it is larger than the sum of its proper divisors (30234211).

1356012473681 is an equidigital number, since it uses as much as digits as its factorization.

1356012473681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30234210.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 1356012473681 in words is "one trillion, three hundred fifty-six billion, twelve million, four hundred seventy-three thousand, six hundred eighty-one".