1005516645 has 64 divisors (see below), whose sum is σ = 1951395840. Its totient is φ = 432165888.

The previous prime is 1005516641. The next prime is 1005516649. The reversal of 1005516645 is 5466155001.

It is an interprime number because it is at equal distance from previous prime (1005516641) and next prime (1005516649).

It is not a de Polignac number, because 1005516645 - 2² = 1005516641 is a prime.

It is a super-2 number, since 2×1005516645² = 2022127446744112050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005516641) 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, 138957 + ... + 146013.

It is an arithmetic number, because the mean of its divisors is an integer number (30490560).

Almost surely, 2^1005516645 is an apocalyptic number.

1005516645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1005516645 is a deficient number, since it is larger than the sum of its proper divisors (945879195).

1005516645 is a wasteful number, since it uses less digits than its factorization.

1005516645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7154.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 1005516645 is about 31709.8824501132. The cubic root of 1005516645 is about 1001.8355105065.

The spelling of 1005516645 in words is "one billion, five million, five hundred sixteen thousand, six hundred forty-five".