1155720254976 has 880 divisors, whose sum is σ = 4082532225024. Its totient is φ = 319987003392.

The previous prime is 1155720254867. The next prime is 1155720254981. The reversal of 1155720254976 is 6794520275511.

1155720254976 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 7 + 20 + 2 + 549 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 87 ways as a sum of consecutive naturals, for example, 9100159425 + ... + 9100159551.

Almost surely, 2^{1155720254976} is an apocalyptic number.

1155720254976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155720254976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2041266112512).

1155720254976 is an abundant number, since it is smaller than the sum of its proper divisors (2926811970048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155720254976 is an frugal number, since it uses more digits than its factorization.

1155720254976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 54.

The spelling of 1155720254976 in words is "one trillion, one hundred fifty-five billion, seven hundred twenty million, two hundred fifty-four thousand, nine hundred seventy-six".