64239251345 has 12 divisors (see below), whose sum is σ = 77814344244. Its totient is φ = 50911062240.

The previous prime is 64239251333. The next prime is 64239251357. The reversal of 64239251345 is 54315293246.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64239251333) and next prime (64239251357).

It can be written as a sum of positive squares in 2 ways, for example, as 24672869776 + 39566381569 = 157076^2 + 198913^2 .

It is not a de Polignac number, because 64239251345 - 2¹² = 64239247249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64239251296 and 64239251305.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 503846 + ... + 618335.

It is an arithmetic number, because the mean of its divisors is an integer number (6484528687).

Almost surely, 2^64239251345 is an apocalyptic number.

It is an amenable number.

64239251345 is a deficient number, since it is larger than the sum of its proper divisors (13575092899).

64239251345 is a wasteful number, since it uses less digits than its factorization.

64239251345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122400 (or 1122293 counting only the distinct ones).

The product of its digits is 777600, while the sum is 44.

The spelling of 64239251345 in words is "sixty-four billion, two hundred thirty-nine million, two hundred fifty-one thousand, three hundred forty-five".