1091502667681 has 4 divisors (see below), whose sum is σ = 1091505294000. Its totient is φ = 1091500041364.

The previous prime is 1091502667679. The next prime is 1091502667691. The reversal of 1091502667681 is 1867662051901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1091502667681 - 2¹ = 1091502667679 is a prime.

It is a super-2 number, since 2×1091502667681² (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 (1091502667621) 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, 536731 + ... + 1571968.

It is an arithmetic number, because the mean of its divisors is an integer number (272876323500).

Almost surely, 2^{1091502667681} is an apocalyptic number.

It is an amenable number.

1091502667681 is a deficient number, since it is larger than the sum of its proper divisors (2626319).

1091502667681 is an equidigital number, since it uses as much as digits as its factorization.

1091502667681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626318.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 1091502667681 in words is "one trillion, ninety-one billion, five hundred two million, six hundred sixty-seven thousand, six hundred eighty-one".