645300525540126 has 16 divisors (see below), whose sum is σ = 1291086787299984. Its totient is φ = 215019219143424.

The previous prime is 645300525540091. The next prime is 645300525540133. The reversal of 645300525540126 is 621045525003546.

645300525540126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20238991885 + ... + 20239023768.

It is an arithmetic number, because the mean of its divisors is an integer number (80692924206249).

Almost surely, 2^{645300525540126} is an apocalyptic number.

645300525540126 is an abundant number, since it is smaller than the sum of its proper divisors (645786261759858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645300525540126 is a wasteful number, since it uses less digits than its factorization.

645300525540126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40478018315.

The product of its (nonzero) digits is 4320000, while the sum is 48.

The spelling of 645300525540126 in words is "six hundred forty-five trillion, three hundred billion, five hundred twenty-five million, five hundred forty thousand, one hundred twenty-six".