651222640601 has 16 divisors (see below), whose sum is σ = 747554346000. Its totient is φ = 561970956288.

The previous prime is 651222640583. The next prime is 651222640603. The reversal of 651222640601 is 106046222156.

It can be written as a sum of positive squares in 8 ways, for example, as 131388850576 + 519833790025 = 362476^2 + 720995^2 .

It is a cyclic number.

It is not a de Polignac number, because 651222640601 - 2¹⁰ = 651222639577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651222640603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9855356 + ... + 9921213.

It is an arithmetic number, because the mean of its divisors is an integer number (46722146625).

Almost surely, 2^651222640601 is an apocalyptic number.

It is an amenable number.

651222640601 is a deficient number, since it is larger than the sum of its proper divisors (96331705399).

651222640601 is a wasteful number, since it uses less digits than its factorization.

651222640601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19776748.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 651222640601 its reverse (106046222156), we get a palindrome (757268862757).

The spelling of 651222640601 in words is "six hundred fifty-one billion, two hundred twenty-two million, six hundred forty thousand, six hundred one".