651044340423 has 32 divisors (see below), whose sum is σ = 967438080000. Its totient is φ = 432713793600.

The previous prime is 651044340409. The next prime is 651044340431. The reversal of 651044340423 is 324043440156.

It is not a de Polignac number, because 651044340423 - 2⁴ = 651044340407 is a prime.

It is a super-2 number, since 2×651044340423² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651044240423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13327363 + ... + 13376123.

It is an arithmetic number, because the mean of its divisors is an integer number (30232440000).

Almost surely, 2^651044340423 is an apocalyptic number.

651044340423 is a deficient number, since it is larger than the sum of its proper divisors (316393739577).

651044340423 is a wasteful number, since it uses less digits than its factorization.

651044340423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50260 (or 50254 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 651044340423 its reverse (324043440156), we get a palindrome (975087780579).

The spelling of 651044340423 in words is "six hundred fifty-one billion, forty-four million, three hundred forty thousand, four hundred twenty-three".