64896441440642 has 12 divisors (see below), whose sum is σ = 113237668228230. Its totient is φ = 27812760617376.

The previous prime is 64896441440591. The next prime is 64896441440659. The reversal of 64896441440642 is 24604414469846.

It can be written as a sum of positive squares in only one way, i.e., 37824701732041 + 27071739708601 = 6150179^2 + 5203051^2 .

It is a super-2 number, since 2×64896441440642² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 331104292967 + ... + 331104293162.

Almost surely, 2^{64896441440642} is an apocalyptic number.

64896441440642 is a deficient number, since it is larger than the sum of its proper divisors (48341226787588).

64896441440642 is a wasteful number, since it uses less digits than its factorization.

64896441440642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662208586145 (or 662208586138 counting only the distinct ones).

The product of its (nonzero) digits is 127401984, while the sum is 62.

The spelling of 64896441440642 in words is "sixty-four trillion, eight hundred ninety-six billion, four hundred forty-one million, four hundred forty thousand, six hundred forty-two".