645540646126 has 8 divisors (see below), whose sum is σ = 968314380480. Its totient is φ = 322769185968.

The previous prime is 645540646109. The next prime is 645540646133. The reversal of 645540646126 is 621646045546.

645540646126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 645540646126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798250 + ... + 1388626.

It is an arithmetic number, because the mean of its divisors is an integer number (121039297560).

Almost surely, 2^645540646126 is an apocalyptic number.

645540646126 is a deficient number, since it is larger than the sum of its proper divisors (322773734354).

645540646126 is a wasteful number, since it uses less digits than its factorization.

645540646126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137098.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 645540646126 in words is "six hundred forty-five billion, five hundred forty million, six hundred forty-six thousand, one hundred twenty-six".