651460864449 has 4 divisors (see below), whose sum is σ = 868614485936. Its totient is φ = 434307242964.

The previous prime is 651460864447. The next prime is 651460864477. The reversal of 651460864449 is 944468064156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 651460864449 - 2¹ = 651460864447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651460864447) 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, 108576810739 + ... + 108576810744.

It is an arithmetic number, because the mean of its divisors is an integer number (217153621484).

Almost surely, 2^651460864449 is an apocalyptic number.

It is an amenable number.

651460864449 is a deficient number, since it is larger than the sum of its proper divisors (217153621487).

651460864449 is a wasteful number, since it uses less digits than its factorization.

651460864449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217153621486.

The product of its (nonzero) digits is 19906560, while the sum is 57.

The spelling of 651460864449 in words is "six hundred fifty-one billion, four hundred sixty million, eight hundred sixty-four thousand, four hundred forty-nine".