1156455663 has 32 divisors (see below), whose sum is σ = 1758730752. Its totient is φ = 669081600.

The previous prime is 1156455647. The next prime is 1156455667. The reversal of 1156455663 is 3665546511.

It is not a de Polignac number, because 1156455663 - 2⁴ = 1156455647 is a prime.

It is a super-4 number, since 4×1156455663⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156455667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485331 + ... + 487707.

It is an arithmetic number, because the mean of its divisors is an integer number (54960336).

Almost surely, 2^1156455663 is an apocalyptic number.

1156455663 is a deficient number, since it is larger than the sum of its proper divisors (602275089).

1156455663 is a wasteful number, since it uses less digits than its factorization.

1156455663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055.

The product of its digits is 324000, while the sum is 42.

The square root of 1156455663 is about 34006.7002662711. The cubic root of 1156455663 is about 1049.6463398508.

The spelling of 1156455663 in words is "one billion, one hundred fifty-six million, four hundred fifty-five thousand, six hundred sixty-three".