64115956247 has 36 divisors (see below), whose sum is σ = 81430931880. Its totient is φ = 50268369312.

The previous prime is 64115956217. The next prime is 64115956273. The reversal of 64115956247 is 74265951146.

It is not a de Polignac number, because 64115956247 - 2¹⁴ = 64115939863 is a prime.

It is a super-2 number, since 2×64115956247² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64115956195 and 64115956204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64115956217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 450488 + ... + 575474.

It is an arithmetic number, because the mean of its divisors is an integer number (2261970330).

Almost surely, 2^64115956247 is an apocalyptic number.

64115956247 is a deficient number, since it is larger than the sum of its proper divisors (17314975633).

64115956247 is a wasteful number, since it uses less digits than its factorization.

64115956247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125068 (or 125042 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 50.

The spelling of 64115956247 in words is "sixty-four billion, one hundred fifteen million, nine hundred fifty-six thousand, two hundred forty-seven".