64839107450 has 24 divisors (see below), whose sum is σ = 129877721148. Its totient is φ = 23940593280.

The previous prime is 64839107449. The next prime is 64839107471. The reversal of 64839107450 is 5470193846.

It can be written as a sum of positive squares in 6 ways, for example, as 9399108601 + 55439998849 = 96949^2 + 235457^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64839107395 and 64839107404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49875587 + ... + 49876886.

Almost surely, 2^64839107450 is an apocalyptic number.

64839107450 is an abundant number, since it is smaller than the sum of its proper divisors (65038613698).

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

64839107450 is a wasteful number, since it uses less digits than its factorization.

64839107450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99752498 (or 99752493 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 64839107450 in words is "sixty-four billion, eight hundred thirty-nine million, one hundred seven thousand, four hundred fifty".