6404661634274 has 4 divisors (see below), whose sum is σ = 9606992451414. Its totient is φ = 3202330817136.

The previous prime is 6404661634271. The next prime is 6404661634321. The reversal of 6404661634274 is 4724361664046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5799634347049 + 605027287225 = 2408243^2 + 777835^2 .

It is not an unprimeable number, because it can be changed into a prime (6404661634271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1601165408567 + ... + 1601165408570.

Almost surely, 2^{6404661634274} is an apocalyptic number.

6404661634274 is a deficient number, since it is larger than the sum of its proper divisors (3202330817140).

6404661634274 is a wasteful number, since it uses less digits than its factorization.

6404661634274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202330817139.

The product of its (nonzero) digits is 13934592, while the sum is 53.

The spelling of 6404661634274 in words is "six trillion, four hundred four billion, six hundred sixty-one million, six hundred thirty-four thousand, two hundred seventy-four".