1191486320641 has 4 divisors (see below), whose sum is σ = 1194630084400. Its totient is φ = 1188342556884.

The previous prime is 1191486320639. The next prime is 1191486320653. The reversal of 1191486320641 is 1460236841911.

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 1191486320641 - 2¹ = 1191486320639 is a prime.

It is a super-4 number, since 4×1191486320641⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1191486320591 and 1191486320600.

It is not an unprimeable number, because it can be changed into a prime (1191486320611) 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, 1571881311 + ... + 1571882068.

It is an arithmetic number, because the mean of its divisors is an integer number (298657521100).

Almost surely, 2^{1191486320641} is an apocalyptic number.

It is an amenable number.

1191486320641 is a deficient number, since it is larger than the sum of its proper divisors (3143763759).

1191486320641 is an equidigital number, since it uses as much as digits as its factorization.

1191486320641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143763758.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 1191486320641 in words is "one trillion, one hundred ninety-one billion, four hundred eighty-six million, three hundred twenty thousand, six hundred forty-one".