1155321426641 has 4 divisors (see below), whose sum is σ = 1155324726384. Its totient is φ = 1155318126900.

The previous prime is 1155321426629. The next prime is 1155321426647. The reversal of 1155321426641 is 1466241235511.

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 a de Polignac number, because none of the positive numbers 2^k-1155321426641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155321426647) 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, 1052615 + ... + 1848956.

It is an arithmetic number, because the mean of its divisors is an integer number (288831181596).

Almost surely, 2^{1155321426641} is an apocalyptic number.

It is an amenable number.

1155321426641 is a deficient number, since it is larger than the sum of its proper divisors (3299743).

1155321426641 is an equidigital number, since it uses as much as digits as its factorization.

1155321426641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299742.

The product of its digits is 172800, while the sum is 41.

The spelling of 1155321426641 in words is "one trillion, one hundred fifty-five billion, three hundred twenty-one million, four hundred twenty-six thousand, six hundred forty-one".