64860991737229 has 2 divisors, whose sum is σ = 64860991737230. Its totient is φ = 64860991737228.

The previous prime is 64860991737221. The next prime is 64860991737317. The reversal of 64860991737229 is 92273719906846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43726835841129 + 21134155896100 = 6612627^2 + 4597190^2 .

It is a cyclic number.

It is not a de Polignac number, because 64860991737229 - 2³ = 64860991737221 is a prime.

It is a super-2 number, since 2×64860991737229² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64860991737221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32430495868614 + 32430495868615.

It is an arithmetic number, because the mean of its divisors is an integer number (32430495868615).

Almost surely, 2^{64860991737229} is an apocalyptic number.

It is an amenable number.

64860991737229 is a deficient number, since it is larger than the sum of its proper divisors (1).

64860991737229 is an equidigital number, since it uses as much as digits as its factorization.

64860991737229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493807104, while the sum is 73.

The spelling of 64860991737229 in words is "sixty-four trillion, eight hundred sixty billion, nine hundred ninety-one million, seven hundred thirty-seven thousand, two hundred twenty-nine".