64113775081 has 8 divisors (see below), whose sum is σ = 64176646464. Its totient is φ = 64050933360.

The previous prime is 64113775079. The next prime is 64113775147. The reversal of 64113775081 is 18057731146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64113775081 - 2¹ = 64113775079 is a prime.

It is a super-2 number, since 2×64113775081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64113775981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8104530 + ... + 8112436.

It is an arithmetic number, because the mean of its divisors is an integer number (8022080808).

Almost surely, 2^64113775081 is an apocalyptic number.

It is an amenable number.

64113775081 is a deficient number, since it is larger than the sum of its proper divisors (62871383).

64113775081 is a wasteful number, since it uses less digits than its factorization.

64113775081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14831.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 64113775081 in words is "sixty-four billion, one hundred thirteen million, seven hundred seventy-five thousand, eighty-one".