1045551663 has 72 divisors (see below), whose sum is σ = 1782681264. Its totient is φ = 584962560.

The previous prime is 1045551659. The next prime is 1045551667. The reversal of 1045551663 is 3661555401.

1045551663 is a `hidden beast` number, since 1 + 0 + 45 + 551 + 6 + 63 = 666.

It is an interprime number because it is at equal distance from previous prime (1045551659) and next prime (1045551667).

It is not a de Polignac number, because 1045551663 - 2² = 1045551659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045551667) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1911156 + ... + 1911702.

It is an arithmetic number, because the mean of its divisors is an integer number (24759462).

Almost surely, 2^1045551663 is an apocalyptic number.

1045551663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1045551663 is a deficient number, since it is larger than the sum of its proper divisors (737129601).

1045551663 is a wasteful number, since it uses less digits than its factorization.

1045551663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 1045551663 is about 32334.9913097251. The cubic root of 1045551663 is about 1014.9590001800.

The spelling of 1045551663 in words is "one billion, forty-five million, five hundred fifty-one thousand, six hundred sixty-three".