1155400377 has 16 divisors (see below), whose sum is σ = 1646725248. Its totient is φ = 718805120.

The previous prime is 1155400373. The next prime is 1155400381. The reversal of 1155400377 is 7730045511.

It is an interprime number because it is at equal distance from previous prime (1155400373) and next prime (1155400381).

It is a cyclic number.

It is not a de Polignac number, because 1155400377 - 2² = 1155400373 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1155400373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201378 + ... + 207035.

It is an arithmetic number, because the mean of its divisors is an integer number (102920328).

Almost surely, 2^1155400377 is an apocalyptic number.

It is an amenable number.

1155400377 is a deficient number, since it is larger than the sum of its proper divisors (491324871).

1155400377 is a wasteful number, since it uses less digits than its factorization.

1155400377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408480.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 1155400377 is about 33991.1808709259. The cubic root of 1155400377 is about 1049.3269691452.

Adding to 1155400377 its reverse (7730045511), we get a palindrome (8885445888).

The spelling of 1155400377 in words is "one billion, one hundred fifty-five million, four hundred thousand, three hundred seventy-seven".