1155425279978 has 8 divisors (see below), whose sum is σ = 1733371802400. Its totient is φ = 577634679180.

The previous prime is 1155425279947. The next prime is 1155425279999. The reversal of 1155425279978 is 8799725245511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1155425279978² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38961878 + ... + 38991521.

It is an arithmetic number, because the mean of its divisors is an integer number (216671475300).

Almost surely, 2^{1155425279978} is an apocalyptic number.

1155425279978 is a deficient number, since it is larger than the sum of its proper divisors (577946522422).

1155425279978 is an equidigital number, since it uses as much as digits as its factorization.

1155425279978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77960812.

The product of its digits is 63504000, while the sum is 65.

The spelling of 1155425279978 in words is "one trillion, one hundred fifty-five billion, four hundred twenty-five million, two hundred seventy-nine thousand, nine hundred seventy-eight".