64404018398 has 16 divisors (see below), whose sum is σ = 97763604480. Its totient is φ = 31817722776.

The previous prime is 64404018391. The next prime is 64404018457. The reversal of 64404018398 is 89381040446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64404018391) 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, 310928 + ... + 474851.

It is an arithmetic number, because the mean of its divisors is an integer number (6110225280).

Almost surely, 2^64404018398 is an apocalyptic number.

64404018398 is a deficient number, since it is larger than the sum of its proper divisors (33359586082).

64404018398 is a wasteful number, since it uses less digits than its factorization.

64404018398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786271.

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 64404018398 in words is "sixty-four billion, four hundred four million, eighteen thousand, three hundred ninety-eight".