64144535 has 16 divisors (see below), whose sum is σ = 94737216. Its totient is φ = 40601088.

The previous prime is 64144523. The next prime is 64144537. The reversal of 64144535 is 53544146.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64144535 is a prime.

It is a super-2 number, since 2×64144535² = 8229042740732450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64144537) 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, 70034 + ... + 70943.

It is an arithmetic number, because the mean of its divisors is an integer number (5921076).

Almost surely, 2^64144535 is an apocalyptic number.

64144535 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64144535 is a deficient number, since it is larger than the sum of its proper divisors (30592681).

64144535 is a wasteful number, since it uses less digits than its factorization.

64144535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141002.

The product of its digits is 28800, while the sum is 32.

The square root of 64144535 is about 8009.0283430638. The cubic root of 64144535 is about 400.3008881923.

The spelling of 64144535 in words is "sixty-four million, one hundred forty-four thousand, five hundred thirty-five".