64537545602805 has 64 divisors (see below), whose sum is σ = 116131771312128. Its totient is φ = 30329468271360.

The previous prime is 64537545602801. The next prime is 64537545602809. The reversal of 64537545602805 is 50820654573546.

It is an interprime number because it is at equal distance from previous prime (64537545602801) and next prime (64537545602809).

It is not a de Polignac number, because 64537545602805 - 2² = 64537545602801 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 (64537545602801) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18491839 + ... + 21703068.

It is an arithmetic number, because the mean of its divisors is an integer number (1814558926752).

Almost surely, 2^{64537545602805} is an apocalyptic number.

It is an amenable number.

64537545602805 is a deficient number, since it is larger than the sum of its proper divisors (51594225709323).

64537545602805 is a wasteful number, since it uses less digits than its factorization.

64537545602805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40195226.

The product of its (nonzero) digits is 120960000, while the sum is 60.

The spelling of 64537545602805 in words is "sixty-four trillion, five hundred thirty-seven billion, five hundred forty-five million, six hundred two thousand, eight hundred five".