1155500806980 has 576 divisors, whose sum is σ = 3763725606144. Its totient is φ = 263040307200.

The previous prime is 1155500806969. The next prime is 1155500806987. The reversal of 1155500806980 is 896080055511.

It is a super-2 number, since 2×1155500806980² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155500806987) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1691801719 + ... + 1691802401.

It is an arithmetic number, because the mean of its divisors is an integer number (6534245844).

Almost surely, 2^{1155500806980} is an apocalyptic number.

1155500806980 is a gapful number since it is divisible by the number (10) 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 1155500806980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1881862803072).

1155500806980 is an abundant number, since it is smaller than the sum of its proper divisors (2608224799164).

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

1155500806980 is a wasteful number, since it uses less digits than its factorization.

1155500806980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 48.

The spelling of 1155500806980 in words is "one trillion, one hundred fifty-five billion, five hundred million, eight hundred six thousand, nine hundred eighty".