1155455221400 has 48 divisors (see below), whose sum is σ = 2844458891640. Its totient is φ = 434994905600.

The previous prime is 1155455221369. The next prime is 1155455221441. The reversal of 1155455221400 is 41225545511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169916486 + ... + 169923285.

Almost surely, 2^{1155455221400} is an apocalyptic number.

1155455221400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155455221400 is an abundant number, since it is smaller than the sum of its proper divisors (1689003670240).

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

1155455221400 is a wasteful number, since it uses less digits than its factorization.

1155455221400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339839804 (or 339839795 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 35.

The spelling of 1155455221400 in words is "one trillion, one hundred fifty-five billion, four hundred fifty-five million, two hundred twenty-one thousand, four hundred".