651544552523 has 4 divisors (see below), whose sum is σ = 653896699200. Its totient is φ = 649192405848.

The previous prime is 651544552517. The next prime is 651544552543. The reversal of 651544552523 is 325255445156.

651544552523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 651544552523 - 2³⁴ = 634364683339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651544552513) 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, 1176072923 + ... + 1176073476.

It is an arithmetic number, because the mean of its divisors is an integer number (163474174800).

Almost surely, 2^651544552523 is an apocalyptic number.

651544552523 is a deficient number, since it is larger than the sum of its proper divisors (2352146677).

651544552523 is a wasteful number, since it uses less digits than its factorization.

651544552523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352146676.

The product of its digits is 3600000, while the sum is 47.

Adding to 651544552523 its reverse (325255445156), we get a palindrome (976799997679).

The spelling of 651544552523 in words is "six hundred fifty-one billion, five hundred forty-four million, five hundred fifty-two thousand, five hundred twenty-three".