215064562649 has 2 divisors, whose sum is σ = 215064562650. Its totient is φ = 215064562648.

The previous prime is 215064562619. The next prime is 215064562663. The reversal of 215064562649 is 946265460512.

It is a happy number.

215064562649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213809136025 + 1255426624 = 462395^2 + 35432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215064562649 is a prime.

It is a super-2 number, since 2×215064562649² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215064562597 and 215064562606.

It is not a weakly prime, because it can be changed into another prime (215064562619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107532281324 + 107532281325.

It is an arithmetic number, because the mean of its divisors is an integer number (107532281325).

Almost surely, 2^215064562649 is an apocalyptic number.

It is an amenable number.

215064562649 is a deficient number, since it is larger than the sum of its proper divisors (1).

215064562649 is an equidigital number, since it uses as much as digits as its factorization.

215064562649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 215064562649 in words is "two hundred fifteen billion, sixty-four million, five hundred sixty-two thousand, six hundred forty-nine".