1155550651500 has 384 divisors, whose sum is σ = 3880754841600. Its totient is φ = 261725568000.

The previous prime is 1155550651447. The next prime is 1155550651537. The reversal of 1155550651500 is 51560555511.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1059165955 + ... + 1059167045.

It is an arithmetic number, because the mean of its divisors is an integer number (10106132400).

Almost surely, 2^{1155550651500} is an apocalyptic number.

1155550651500 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 1155550651500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1940377420800).

1155550651500 is an abundant number, since it is smaller than the sum of its proper divisors (2725204190100).

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

1155550651500 is a wasteful number, since it uses less digits than its factorization.

1155550651500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946 (or 1934 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 39.

The spelling of 1155550651500 in words is "one trillion, one hundred fifty-five billion, five hundred fifty million, six hundred fifty-one thousand, five hundred".