64868250459 has 4 divisors (see below), whose sum is σ = 86491000616. Its totient is φ = 43245500304.

The previous prime is 64868250443. The next prime is 64868250487. The reversal of 64868250459 is 95405286846.

It is a happy number.

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

It is not a de Polignac number, because 64868250459 - 2⁴ = 64868250443 is a prime.

It is a super-2 number, since 2×64868250459² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64868250399 and 64868250408.

It is not an unprimeable number, because it can be changed into a prime (64868230459) 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, 10811375074 + ... + 10811375079.

It is an arithmetic number, because the mean of its divisors is an integer number (21622750154).

Almost surely, 2^64868250459 is an apocalyptic number.

64868250459 is a deficient number, since it is larger than the sum of its proper divisors (21622750157).

64868250459 is a wasteful number, since it uses less digits than its factorization.

64868250459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21622750156.

The product of its (nonzero) digits is 16588800, while the sum is 57.

The spelling of 64868250459 in words is "sixty-four billion, eight hundred sixty-eight million, two hundred fifty thousand, four hundred fifty-nine".