651252641161211 has 4 divisors (see below), whose sum is σ = 663540426843552. Its totient is φ = 638964855478872.

The previous prime is 651252641161159. The next prime is 651252641161231. The reversal of 651252641161211 is 112161146252156.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 651252641161211 - 2³⁴ = 651235461292027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651252641161231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6143892841091 + ... + 6143892841196.

It is an arithmetic number, because the mean of its divisors is an integer number (165885106710888).

Almost surely, 2^{651252641161211} is an apocalyptic number.

651252641161211 is a deficient number, since it is larger than the sum of its proper divisors (12287785682341).

651252641161211 is a wasteful number, since it uses less digits than its factorization.

651252641161211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12287785682340.

The product of its digits is 172800, while the sum is 44.

The spelling of 651252641161211 in words is "six hundred fifty-one trillion, two hundred fifty-two billion, six hundred forty-one million, one hundred sixty-one thousand, two hundred eleven".