64118739456 has 100 divisors (see below), whose sum is σ = 191377677942. Its totient is φ = 21372899328.

The previous prime is 64118739431. The next prime is 64118739457. The reversal of 64118739456 is 65493781146.

64118739456 is a `hidden beast` number, since 6 + 4 + 1 + 187 + 3 + 9 + 456 = 666.

It can be written as a sum of positive squares in only one way, i.e., 33708960000 + 30409779456 = 183600^2 + 174384^2 .

It is a super-2 number, since 2×64118739456² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (64118739457) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 731565 + ... + 814508.

Almost surely, 2^64118739456 is an apocalyptic number.

It is an amenable number.

64118739456 is an abundant number, since it is smaller than the sum of its proper divisors (127258938486).

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

64118739456 is an equidigital number, since it uses as much as digits as its factorization.

64118739456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546103 (or 1546078 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 64118739456 in words is "sixty-four billion, one hundred eighteen million, seven hundred thirty-nine thousand, four hundred fifty-six".