651256324413 has 4 divisors (see below), whose sum is σ = 868341765888. Its totient is φ = 434170882940.

The previous prime is 651256324403. The next prime is 651256324421. The reversal of 651256324413 is 314423652156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 651256324413 - 2³⁰ = 650182582589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651256324403) 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, 108542720733 + ... + 108542720738.

It is an arithmetic number, because the mean of its divisors is an integer number (217085441472).

Almost surely, 2^651256324413 is an apocalyptic number.

It is an amenable number.

651256324413 is a deficient number, since it is larger than the sum of its proper divisors (217085441475).

651256324413 is a wasteful number, since it uses less digits than its factorization.

651256324413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217085441474.

The product of its digits is 518400, while the sum is 42.

Adding to 651256324413 its reverse (314423652156), we get a palindrome (965679976569).

The spelling of 651256324413 in words is "six hundred fifty-one billion, two hundred fifty-six million, three hundred twenty-four thousand, four hundred thirteen".