64487078446 has 16 divisors (see below), whose sum is σ = 110662452576. Its totient is φ = 27609025536.

The previous prime is 64487078443. The next prime is 64487078449.

It is a happy number.

64487078446 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (64487078443) and next prime (64487078449).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64487078443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2343651 + ... + 2371006.

It is an arithmetic number, because the mean of its divisors is an integer number (6916403286).

Almost surely, 2^64487078446 is an apocalyptic number.

64487078446 is a deficient number, since it is larger than the sum of its proper divisors (46175374130).

64487078446 is a wasteful number, since it uses less digits than its factorization.

64487078446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4715643.

The product of its (nonzero) digits is 28901376, while the sum is 58.

The spelling of 64487078446 in words is "sixty-four billion, four hundred eighty-seven million, seventy-eight thousand, four hundred forty-six".