64890135 has 12 divisors (see below), whose sum is σ = 112476312. Its totient is φ = 34608048.

The previous prime is 64890113. The next prime is 64890143. The reversal of 64890135 is 53109846.

64890135 is a `hidden beast` number, since 648 + 9 + 0 + 1 + 3 + 5 = 666.

It is not a de Polignac number, because 64890135 - 2⁸ = 64889879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64890135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 720957 + ... + 721046.

It is an arithmetic number, because the mean of its divisors is an integer number (9373026).

Almost surely, 2^64890135 is an apocalyptic number.

64890135 is a deficient number, since it is larger than the sum of its proper divisors (47586177).

64890135 is a wasteful number, since it uses less digits than its factorization.

64890135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442014 (or 1442011 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 64890135 is about 8055.4413286921. The cubic root of 64890135 is about 401.8459162955.

It can be divided in two parts, 64890 and 135, that added together give a square (65025 = 255²).

The spelling of 64890135 in words is "sixty-four million, eight hundred ninety thousand, one hundred thirty-five".