1016553645 has 40 divisors (see below), whose sum is σ = 1824641280. Its totient is φ = 541455840.

The previous prime is 1016553619. The next prime is 1016553653. The reversal of 1016553645 is 5463556101.

1016553645 is a `hidden beast` number, since 1 + 0 + 1 + 6 + 5 + 5 + 3 + 645 = 666.

It is not a de Polignac number, because 1016553645 - 2⁸ = 1016553389 is a prime.

It is a super-3 number, since 3×1016553645³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 497536 + ... + 499574.

It is an arithmetic number, because the mean of its divisors is an integer number (45616032).

Almost surely, 2^1016553645 is an apocalyptic number.

1016553645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1016553645 is a deficient number, since it is larger than the sum of its proper divisors (808087635).

1016553645 is a wasteful number, since it uses less digits than its factorization.

1016553645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287 (or 3278 counting only the distinct ones).

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

The square root of 1016553645 is about 31883.4384124423. The cubic root of 1016553645 is about 1005.4877116006.

The spelling of 1016553645 in words is "one billion, sixteen million, five hundred fifty-three thousand, six hundred forty-five".