64985390460 has 36 divisors (see below), whose sum is σ = 197122351608. Its totient is φ = 17329437408.

The previous prime is 64985390453. The next prime is 64985390497. The reversal of 64985390460 is 6409358946.

64985390460 is a `hidden beast` number, since 6 + 4 + 98 + 5 + 3 + 90 + 460 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 64985390397 and 64985390406.

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, 180514794 + ... + 180515153.

It is an arithmetic number, because the mean of its divisors is an integer number (5475620878).

Almost surely, 2^64985390460 is an apocalyptic number.

64985390460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64985390460 is an abundant number, since it is smaller than the sum of its proper divisors (132136961148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64985390460 is a wasteful number, since it uses less digits than its factorization.

64985390460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361029962 (or 361029957 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 64985390460 in words is "sixty-four billion, nine hundred eighty-five million, three hundred ninety thousand, four hundred sixty".