64112015663 has 4 divisors (see below), whose sum is σ = 67883310720. Its totient is φ = 60340720608.

The previous prime is 64112015657. The next prime is 64112015683. The reversal of 64112015663 is 36651021146.

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

It is a cyclic number.

It is not a de Polignac number, because 64112015663 - 2⁶ = 64112015599 is a prime.

It is a super-2 number, since 2×64112015663² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64112015683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1885647503 + ... + 1885647536.

It is an arithmetic number, because the mean of its divisors is an integer number (16970827680).

Almost surely, 2^64112015663 is an apocalyptic number.

64112015663 is a deficient number, since it is larger than the sum of its proper divisors (3771295057).

64112015663 is a wasteful number, since it uses less digits than its factorization.

64112015663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771295056.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 64112015663 in words is "sixty-four billion, one hundred twelve million, fifteen thousand, six hundred sixty-three".