1155601440 has 144 divisors (see below), whose sum is σ = 4506884928. Its totient is φ = 264135168.

The previous prime is 1155601373. The next prime is 1155601457. The reversal of 1155601440 is 441065511.

1155601440 is a `hidden beast` number, since 1 + 1 + 55 + 601 + 4 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47242 + ... + 67401.

It is an arithmetic number, because the mean of its divisors is an integer number (31297812).

Almost surely, 2^1155601440 is an apocalyptic number.

1155601440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155601440 is an abundant number, since it is smaller than the sum of its proper divisors (3351283488).

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

1155601440 is a wasteful number, since it uses less digits than its factorization.

1155601440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114671 (or 114660 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1155601440 is about 33994.1383182454. The cubic root of 1155601440 is about 1049.3878336430.

Adding to 1155601440 its reverse (441065511), we get a palindrome (1596666951).

The spelling of 1155601440 in words is "one billion, one hundred fifty-five million, six hundred one thousand, four hundred forty".