64440540262012 has 6 divisors (see below), whose sum is σ = 112770945458528. Its totient is φ = 32220270131004.

The previous prime is 64440540261983. The next prime is 64440540262019. The reversal of 64440540262012 is 21026204504446.

It is a super-2 number, since 2×64440540262012² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64440540262019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8055067532748 + ... + 8055067532755.

Almost surely, 2^{64440540262012} is an apocalyptic number.

It is an amenable number.

64440540262012 is a deficient number, since it is larger than the sum of its proper divisors (48330405196516).

64440540262012 is a wasteful number, since it uses less digits than its factorization.

64440540262012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16110135065507 (or 16110135065505 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 40.

Adding to 64440540262012 its reverse (21026204504446), we get a palindrome (85466744766458).

The spelling of 64440540262012 in words is "sixty-four trillion, four hundred forty billion, five hundred forty million, two hundred sixty-two thousand, twelve".