64117312756 has 12 divisors (see below), whose sum is σ = 128234625568. Its totient is φ = 27478848312.

The previous prime is 64117312729. The next prime is 64117312799. The reversal of 64117312756 is 65721371146.

64117312756 is an admirable number.

It is a super-3 number, since 3×64117312756³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 1144951986 + ... + 1144952041.

Almost surely, 2^64117312756 is an apocalyptic number.

It is an amenable number.

64117312756 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64117312756 is a wasteful number, since it uses less digits than its factorization.

64117312756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289904038 (or 2289904036 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The spelling of 64117312756 in words is "sixty-four billion, one hundred seventeen million, three hundred twelve thousand, seven hundred fifty-six".