64441636534 has 32 divisors (see below), whose sum is σ = 111670607232. Its totient is φ = 27564240000.

The previous prime is 64441636507. The next prime is 64441636541. The reversal of 64441636534 is 43563614446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3675529 + ... + 3693019.

It is an arithmetic number, because the mean of its divisors is an integer number (3489706476).

Almost surely, 2^64441636534 is an apocalyptic number.

64441636534 is a deficient number, since it is larger than the sum of its proper divisors (47228970698).

64441636534 is a wasteful number, since it uses less digits than its factorization.

64441636534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27372.

The product of its digits is 2488320, while the sum is 46.

The spelling of 64441636534 in words is "sixty-four billion, four hundred forty-one million, six hundred thirty-six thousand, five hundred thirty-four".