651260651 has 4 divisors (see below), whose sum is σ = 652370712. Its totient is φ = 650150592.

The previous prime is 651260641. The next prime is 651260677. The reversal of 651260651 is 156062156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651260651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651260641) 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 3 ways as a sum of consecutive naturals, for example, 554150 + ... + 555323.

It is an arithmetic number, because the mean of its divisors is an integer number (163092678).

Almost surely, 2^651260651 is an apocalyptic number.

651260651 is a deficient number, since it is larger than the sum of its proper divisors (1110061).

651260651 is a wasteful number, since it uses less digits than its factorization.

651260651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110060.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 651260651 is about 25519.8089922319. The cubic root of 651260651 is about 866.7987566092.

The spelling of 651260651 in words is "six hundred fifty-one million, two hundred sixty thousand, six hundred fifty-one".