64238213871 has 48 divisors (see below), whose sum is σ = 105845673024. Its totient is φ = 37191232512.

The previous prime is 64238213869. The next prime is 64238213887. The reversal of 64238213871 is 17831283246.

64238213871 is a `hidden beast` number, since 6 + 423 + 8 + 213 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 64238213871 - 2¹ = 64238213869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64238213801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7010625 + ... + 7019781.

It is an arithmetic number, because the mean of its divisors is an integer number (2205118188).

Almost surely, 2^64238213871 is an apocalyptic number.

64238213871 is a deficient number, since it is larger than the sum of its proper divisors (41607459153).

64238213871 is a wasteful number, since it uses less digits than its factorization.

64238213871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12720 (or 12717 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 64238213871 in words is "sixty-four billion, two hundred thirty-eight million, two hundred thirteen thousand, eight hundred seventy-one".