64618951 has 2 divisors, whose sum is σ = 64618952. Its totient is φ = 64618950.

The previous prime is 64618949. The next prime is 64618979. The reversal of 64618951 is 15981646.

64618951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64618951 - 2¹ = 64618949 is a prime.

Together with 64618949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64618051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32309475 + 32309476.

It is an arithmetic number, because the mean of its divisors is an integer number (32309476).

Almost surely, 2^64618951 is an apocalyptic number.

64618951 is a deficient number, since it is larger than the sum of its proper divisors (1).

64618951 is an equidigital number, since it uses as much as digits as its factorization.

64618951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 64618951 is about 8038.5913566993. The cubic root of 64618951 is about 401.2853465367.

The spelling of 64618951 in words is "sixty-four million, six hundred eighteen thousand, nine hundred fifty-one".