15805140645 has 16 divisors (see below), whose sum is σ = 28900828800. Its totient is φ = 7225207104.

The previous prime is 15805140629. The next prime is 15805140647. The reversal of 15805140645 is 54604150851.

It is not a de Polignac number, because 15805140645 - 2⁴ = 15805140629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15805140647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75262470 + ... + 75262679.

It is an arithmetic number, because the mean of its divisors is an integer number (1806301800).

Almost surely, 2^15805140645 is an apocalyptic number.

15805140645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15805140645 is a deficient number, since it is larger than the sum of its proper divisors (13095688155).

15805140645 is a wasteful number, since it uses less digits than its factorization.

15805140645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150525164.

The product of its (nonzero) digits is 96000, while the sum is 39.

The spelling of 15805140645 in words is "fifteen billion, eight hundred five million, one hundred forty thousand, six hundred forty-five".