64623265625605 has 4 divisors (see below), whose sum is σ = 77547918750732. Its totient is φ = 51698612500480.

The previous prime is 64623265625603. The next prime is 64623265625683. The reversal of 64623265625605 is 50652656232646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24890300604324 + 39732965021281 = 4989018^2 + 6303409^2 .

It is not a de Polignac number, because 64623265625605 - 2¹ = 64623265625603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64623265625605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64623265625603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6462326562556 + ... + 6462326562565.

It is an arithmetic number, because the mean of its divisors is an integer number (19386979687683).

Almost surely, 2^{64623265625605} is an apocalyptic number.

It is an amenable number.

64623265625605 is a deficient number, since it is larger than the sum of its proper divisors (12924653125127).

64623265625605 is a wasteful number, since it uses less digits than its factorization.

64623265625605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12924653125126.

The product of its (nonzero) digits is 93312000, while the sum is 58.

The spelling of 64623265625605 in words is "sixty-four trillion, six hundred twenty-three billion, two hundred sixty-five million, six hundred twenty-five thousand, six hundred five".