64490243085 has 24 divisors (see below), whose sum is σ = 114382698144. Its totient is φ = 33594916320.

The previous prime is 64490243029. The next prime is 64490243101. The reversal of 64490243085 is 58034209446.

64490243085 is a `hidden beast` number, since 64 + 490 + 24 + 3 + 0 + 85 = 666.

It is not a de Polignac number, because 64490243085 - 2⁶ = 64490243021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64490243085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16662211 + ... + 16666080.

It is an arithmetic number, because the mean of its divisors is an integer number (4765945756).

Almost surely, 2^64490243085 is an apocalyptic number.

It is an amenable number.

64490243085 is a deficient number, since it is larger than the sum of its proper divisors (49892455059).

64490243085 is a wasteful number, since it uses less digits than its factorization.

64490243085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33328345 (or 33328342 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 64490243085 in words is "sixty-four billion, four hundred ninety million, two hundred forty-three thousand, eighty-five".