651213456423 has 8 divisors (see below), whose sum is σ = 880513969536. Its totient is φ = 428027623800.

The previous prime is 651213456407. The next prime is 651213456427. The reversal of 651213456423 is 324654312156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 651213456423 - 2⁴ = 651213456407 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651213456427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1528669873 + ... + 1528670298.

It is an arithmetic number, because the mean of its divisors is an integer number (110064246192).

Almost surely, 2^651213456423 is an apocalyptic number.

651213456423 is a deficient number, since it is larger than the sum of its proper divisors (229300513113).

651213456423 is a wasteful number, since it uses less digits than its factorization.

651213456423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057340245.

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

Adding to 651213456423 its reverse (324654312156), we get a palindrome (975867768579).

The spelling of 651213456423 in words is "six hundred fifty-one billion, two hundred thirteen million, four hundred fifty-six thousand, four hundred twenty-three".