651271406723 has 8 divisors (see below), whose sum is σ = 745618285920. Its totient is φ = 557251554240.

The previous prime is 651271406651. The next prime is 651271406743. The reversal of 651271406723 is 327604172156.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 651271406723 - 2¹² = 651271402627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651271406743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81752408 + ... + 81760373.

It is an arithmetic number, because the mean of its divisors is an integer number (93202285740).

Almost surely, 2^651271406723 is an apocalyptic number.

651271406723 is a deficient number, since it is larger than the sum of its proper divisors (94346879197).

651271406723 is a wasteful number, since it uses less digits than its factorization.

651271406723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163513357.

The product of its (nonzero) digits is 423360, while the sum is 44.

Adding to 651271406723 its reverse (327604172156), we get a palindrome (978875578879).

The spelling of 651271406723 in words is "six hundred fifty-one billion, two hundred seventy-one million, four hundred six thousand, seven hundred twenty-three".