645102439635 has 16 divisors (see below), whose sum is σ = 1032217284096. Its totient is φ = 344036840928.

The previous prime is 645102439477. The next prime is 645102439649. The reversal of 645102439635 is 536934201546.

It is not a de Polignac number, because 645102439635 - 2⁹ = 645102439123 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 809739 + ... + 1394948.

It is an arithmetic number, because the mean of its divisors is an integer number (64513580256).

Almost surely, 2^645102439635 is an apocalyptic number.

645102439635 is a deficient number, since it is larger than the sum of its proper divisors (387114844461).

645102439635 is a wasteful number, since it uses less digits than its factorization.

645102439635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224202.

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 645102439635 in words is "six hundred forty-five billion, one hundred two million, four hundred thirty-nine thousand, six hundred thirty-five".