64547542573253 has 4 divisors (see below), whose sum is σ = 64549340741100. Its totient is φ = 64545744405408.

The previous prime is 64547542573229. The next prime is 64547542573301. The reversal of 64547542573253 is 35237524574546.

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 31174992070849 + 33372550502404 = 5583457^2 + 5776898^2 .

It is a cyclic number.

It is not a de Polignac number, because 64547542573253 - 2¹² = 64547542569157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64547542573853) 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, 899030078 + ... + 899101871.

It is an arithmetic number, because the mean of its divisors is an integer number (16137335185275).

Almost surely, 2^{64547542573253} is an apocalyptic number.

It is an amenable number.

64547542573253 is a deficient number, since it is larger than the sum of its proper divisors (1798167847).

64547542573253 is a wasteful number, since it uses less digits than its factorization.

64547542573253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798167846.

The product of its digits is 423360000, while the sum is 62.

The spelling of 64547542573253 in words is "sixty-four trillion, five hundred forty-seven billion, five hundred forty-two million, five hundred seventy-three thousand, two hundred fifty-three".