64469658490 has 36 divisors (see below), whose sum is σ = 121344963642. Its totient is φ = 24659586160.

The previous prime is 64469658457. The next prime is 64469658521. The reversal of 64469658490 is 9485696446.

It can be written as a sum of positive squares in only one way, i.e., 58022692641 + 6446965849 = 240879^2 + 80293^2 .

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 17 ways as a sum of consecutive naturals, for example, 18465645 + ... + 18469135.

Almost surely, 2^64469658490 is an apocalyptic number.

64469658490 is a deficient number, since it is larger than the sum of its proper divisors (56875305152).

64469658490 is an frugal number, since it uses more digits than its factorization.

64469658490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7035 (or 3521 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 61.

The spelling of 64469658490 in words is "sixty-four billion, four hundred sixty-nine million, six hundred fifty-eight thousand, four hundred ninety".