64687029247 has 2 divisors, whose sum is σ = 64687029248. Its totient is φ = 64687029246.

The previous prime is 64687029241. The next prime is 64687029269. The reversal of 64687029247 is 74292078646.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64687029247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64687029241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32343514623 + 32343514624.

It is an arithmetic number, because the mean of its divisors is an integer number (32343514624).

Almost surely, 2^64687029247 is an apocalyptic number.

64687029247 is a deficient number, since it is larger than the sum of its proper divisors (1).

64687029247 is an equidigital number, since it uses as much as digits as its factorization.

64687029247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 64687029247 in words is "sixty-four billion, six hundred eighty-seven million, twenty-nine thousand, two hundred forty-seven".