64871534 has 32 divisors (see below), whose sum is σ = 120185856. Its totient is φ = 25572960.

The previous prime is 64871501. The next prime is 64871537. The reversal of 64871534 is 43517846.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

Its product of digits (80640) is a multiple of the sum of its prime divisors (1280).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64871537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78029 + ... + 78855.

It is an arithmetic number, because the mean of its divisors is an integer number (3755808).

Almost surely, 2^64871534 is an apocalyptic number.

64871534 is a deficient number, since it is larger than the sum of its proper divisors (55314322).

64871534 is a wasteful number, since it uses less digits than its factorization.

64871534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280.

The product of its digits is 80640, while the sum is 38.

The square root of 64871534 is about 8054.2866847412. The cubic root of 64871534 is about 401.8075157476.

The spelling of 64871534 in words is "sixty-four million, eight hundred seventy-one thousand, five hundred thirty-four".