64259724097 has 4 divisors (see below), whose sum is σ = 64728773316. Its totient is φ = 63790674880.

The previous prime is 64259724059. The next prime is 64259724103. The reversal of 64259724097 is 79042795246.

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 16098788161 + 48160935936 = 126881^2 + 219456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64259724097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (62259724097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234524404 + ... + 234524677.

It is an arithmetic number, because the mean of its divisors is an integer number (16182193329).

Almost surely, 2^64259724097 is an apocalyptic number.

It is an amenable number.

64259724097 is a deficient number, since it is larger than the sum of its proper divisors (469049219).

64259724097 is a wasteful number, since it uses less digits than its factorization.

64259724097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469049218.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 64259724097 in words is "sixty-four billion, two hundred fifty-nine million, seven hundred twenty-four thousand, ninety-seven".