1145663541 has 64 divisors (see below), whose sum is σ = 1980426240. Its totient is φ = 646859520.

The previous prime is 1145663537. The next prime is 1145663543. The reversal of 1145663541 is 1453665411.

1145663541 is a `hidden beast` number, since 1 + 1 + 4 + 56 + 63 + 541 = 666.

It is not a de Polignac number, because 1145663541 - 2² = 1145663537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1145663496 and 1145663505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145663543) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 518946 + ... + 521148.

It is an arithmetic number, because the mean of its divisors is an integer number (30944160).

Almost surely, 2^1145663541 is an apocalyptic number.

1145663541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1145663541 is a deficient number, since it is larger than the sum of its proper divisors (834762699).

1145663541 is a wasteful number, since it uses less digits than its factorization.

1145663541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343 (or 2337 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 1145663541 is about 33847.6519274233. The cubic root of 1145663541 is about 1046.3710066745.

The spelling of 1145663541 in words is "one billion, one hundred forty-five million, six hundred sixty-three thousand, five hundred forty-one".