64487643290 has 32 divisors (see below), whose sum is σ = 133092457344. Its totient is φ = 22038022080.

The previous prime is 64487643287. The next prime is 64487643301. The reversal of 64487643290 is 9234678446.

It is a super-2 number, since 2×64487643290² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1478921 + ... + 1521900.

It is an arithmetic number, because the mean of its divisors is an integer number (4159139292).

Almost surely, 2^64487643290 is an apocalyptic number.

64487643290 is an abundant number, since it is smaller than the sum of its proper divisors (68604814054).

64487643290 is a wasteful number, since it uses less digits than its factorization.

64487643290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001142.

The product of its (nonzero) digits is 6967296, while the sum is 53.

The spelling of 64487643290 in words is "sixty-four billion, four hundred eighty-seven million, six hundred forty-three thousand, two hundred ninety".