6442526631364 has 6 divisors (see below), whose sum is σ = 11274421604894. Its totient is φ = 3221263315680.

The previous prime is 6442526631341. The next prime is 6442526631371. The reversal of 6442526631364 is 4631366252446.

It can be written as a sum of positive squares in only one way, i.e., 6435394828864 + 7131802500 = 2536808^2 + 84450^2 .

It is a super-2 number, since 2×6442526631364² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805315828917 + ... + 805315828924.

Almost surely, 2^{6442526631364} is an apocalyptic number.

It is an amenable number.

6442526631364 is a deficient number, since it is larger than the sum of its proper divisors (4831894973530).

6442526631364 is a wasteful number, since it uses less digits than its factorization.

6442526631364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610631657845 (or 1610631657843 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 52.

The spelling of 6442526631364 in words is "six trillion, four hundred forty-two billion, five hundred twenty-six million, six hundred thirty-one thousand, three hundred sixty-four".