645110610105 has 48 divisors (see below), whose sum is σ = 1118097440640. Its totient is φ = 317475085824.

The previous prime is 645110610091. The next prime is 645110610107. The reversal of 645110610105 is 501016011546.

It is not a de Polignac number, because 645110610105 - 2⁵ = 645110610073 is a prime.

It is a super-2 number, since 2×645110610105² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645110610107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6993876 + ... + 7085514.

It is an arithmetic number, because the mean of its divisors is an integer number (23293696680).

Almost surely, 2^645110610105 is an apocalyptic number.

645110610105 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

645110610105 is a deficient number, since it is larger than the sum of its proper divisors (472986830535).

645110610105 is a wasteful number, since it uses less digits than its factorization.

645110610105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94450 (or 94437 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The spelling of 645110610105 in words is "six hundred forty-five billion, one hundred ten million, six hundred ten thousand, one hundred five".