646963151 has 2 divisors, whose sum is σ = 646963152. Its totient is φ = 646963150.

The previous prime is 646963111. The next prime is 646963181. The reversal of 646963151 is 151369646.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646963151 is a prime.

It is a super-2 number, since 2×646963151² = 837122637503697602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646963099 and 646963108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646963111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323481575 + 323481576.

It is an arithmetic number, because the mean of its divisors is an integer number (323481576).

Almost surely, 2^646963151 is an apocalyptic number.

646963151 is a deficient number, since it is larger than the sum of its proper divisors (1).

646963151 is an equidigital number, since it uses as much as digits as its factorization.

646963151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 646963151 is about 25435.4703318024. The cubic root of 646963151 is about 864.8879541239.

The spelling of 646963151 in words is "six hundred forty-six million, nine hundred sixty-three thousand, one hundred fifty-one".