64446040066040 has 16 divisors (see below), whose sum is σ = 145003590148680. Its totient is φ = 25778416026400.

The previous prime is 64446040066027. The next prime is 64446040066097. The reversal of 64446040066040 is 4066004064446.

It is a super-2 number, since 2×64446040066040² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64446040065982 and 64446040066000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805575500786 + ... + 805575500865.

Almost surely, 2^{64446040066040} is an apocalyptic number.

It is an amenable number.

64446040066040 is an abundant number, since it is smaller than the sum of its proper divisors (80557550082640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64446040066040 is a wasteful number, since it uses less digits than its factorization.

64446040066040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611151001662 (or 1611151001658 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 44.

The spelling of 64446040066040 in words is "sixty-four trillion, four hundred forty-six billion, forty million, sixty-six thousand, forty".