651653543 has 4 divisors (see below), whose sum is σ = 665518560. Its totient is φ = 637788528.

The previous prime is 651653491. The next prime is 651653579. The reversal of 651653543 is 345356156.

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 651653543 - 2¹⁴ = 651637159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 651653497 and 651653506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651653143) 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, 6932438 + ... + 6932531.

It is an arithmetic number, because the mean of its divisors is an integer number (166379640).

Almost surely, 2^651653543 is an apocalyptic number.

651653543 is a deficient number, since it is larger than the sum of its proper divisors (13865017).

651653543 is a wasteful number, since it uses less digits than its factorization.

651653543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13865016.

The product of its digits is 162000, while the sum is 38.

The square root of 651653543 is about 25527.5056164914. The cubic root of 651653543 is about 866.9730287871.

The spelling of 651653543 in words is "six hundred fifty-one million, six hundred fifty-three thousand, five hundred forty-three".