64487871 has 36 divisors (see below), whose sum is σ = 108927000. Its totient is φ = 36656928.

The previous prime is 64487867. The next prime is 64487879. The reversal of 64487871 is 17878446.

It is not a de Polignac number, because 64487871 - 2² = 64487867 is a prime.

It is a super-2 number, since 2×64487871² = 8317371012225282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64487879) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 153700 + ... + 154118.

It is an arithmetic number, because the mean of its divisors is an integer number (3025750).

Almost surely, 2^64487871 is an apocalyptic number.

64487871 is a deficient number, since it is larger than the sum of its proper divisors (44439129).

64487871 is a wasteful number, since it uses less digits than its factorization.

64487871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 778 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 64487871 is about 8030.4340480450. The cubic root of 64487871 is about 401.0138261371.

The spelling of 64487871 in words is "sixty-four million, four hundred eighty-seven thousand, eight hundred seventy-one".