1155425279977 has 4 divisors (see below), whose sum is σ = 1157740762000. Its totient is φ = 1153109797956.

The previous prime is 1155425279947. The next prime is 1155425279999. The reversal of 1155425279977 is 7799725245511.

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-1155425279977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155425279947) 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, 1157740263 + ... + 1157741260.

It is an arithmetic number, because the mean of its divisors is an integer number (289435190500).

Almost surely, 2^{1155425279977} is an apocalyptic number.

It is an amenable number.

1155425279977 is a deficient number, since it is larger than the sum of its proper divisors (2315482023).

1155425279977 is an equidigital number, since it uses as much as digits as its factorization.

1155425279977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315482022.

The product of its digits is 55566000, while the sum is 64.

The spelling of 1155425279977 in words is "one trillion, one hundred fifty-five billion, four hundred twenty-five million, two hundred seventy-nine thousand, nine hundred seventy-seven".