651574961 has 4 divisors (see below), whose sum is σ = 685868400. Its totient is φ = 617281524.

The previous prime is 651574943. The next prime is 651575011. The reversal of 651574961 is 169475156.

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 a cyclic number.

It is not a de Polignac number, because 651574961 - 2¹⁴ = 651558577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651574361) 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, 17146691 + ... + 17146728.

It is an arithmetic number, because the mean of its divisors is an integer number (171467100).

Almost surely, 2^651574961 is an apocalyptic number.

It is an amenable number.

651574961 is a deficient number, since it is larger than the sum of its proper divisors (34293439).

651574961 is a wasteful number, since it uses less digits than its factorization.

651574961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34293438.

The product of its digits is 226800, while the sum is 44.

The square root of 651574961 is about 25525.9664067788. The cubic root of 651574961 is about 866.9381783599.

The spelling of 651574961 in words is "six hundred fifty-one million, five hundred seventy-four thousand, nine hundred sixty-one".