1155426787563 has 4 divisors (see below), whose sum is σ = 1540569050088. Its totient is φ = 770284525040.

The previous prime is 1155426787561. The next prime is 1155426787579. The reversal of 1155426787563 is 3657876245511.

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

It is a cyclic number.

It is not a de Polignac number, because 1155426787563 - 2¹ = 1155426787561 is a prime.

It is a super-2 number, since 2×1155426787563² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1155426787497 and 1155426787506.

It is not an unprimeable number, because it can be changed into a prime (1155426787561) 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, 192571131258 + ... + 192571131263.

It is an arithmetic number, because the mean of its divisors is an integer number (385142262522).

Almost surely, 2^{1155426787563} is an apocalyptic number.

1155426787563 is a deficient number, since it is larger than the sum of its proper divisors (385142262525).

1155426787563 is an equidigital number, since it uses as much as digits as its factorization.

1155426787563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385142262524.

The product of its digits is 42336000, while the sum is 60.

The spelling of 1155426787563 in words is "one trillion, one hundred fifty-five billion, four hundred twenty-six million, seven hundred eighty-seven thousand, five hundred sixty-three".