64761617 has 2 divisors, whose sum is σ = 64761618. Its totient is φ = 64761616.

The previous prime is 64761547. The next prime is 64761623. The reversal of 64761617 is 71616746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61952641 + 2808976 = 7871^2 + 1676^2 .

It is a cyclic number.

It is not a de Polignac number, because 64761617 - 2¹² = 64757521 is a prime.

It is not a weakly prime, because it can be changed into another prime (64761667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32380808 + 32380809.

It is an arithmetic number, because the mean of its divisors is an integer number (32380809).

Almost surely, 2^64761617 is an apocalyptic number.

It is an amenable number.

64761617 is a deficient number, since it is larger than the sum of its proper divisors (1).

64761617 is an equidigital number, since it uses as much as digits as its factorization.

64761617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 64761617 is about 8047.4602825985. The cubic root of 64761617 is about 401.5804493090.

The spelling of 64761617 in words is "sixty-four million, seven hundred sixty-one thousand, six hundred seventeen".