64531370412 has 48 divisors (see below), whose sum is σ = 167327203680. Its totient is φ = 21507416064.

The previous prime is 64531370381. The next prime is 64531370417. The reversal of 64531370412 is 21407313546.

64531370412 is a `hidden beast` number, since 64 + 53 + 137 + 0 + 412 = 666.

64531370412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×64531370412³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (64531370417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 803308 + ... + 879980.

It is an arithmetic number, because the mean of its divisors is an integer number (3485983410).

Almost surely, 2^64531370412 is an apocalyptic number.

It is an amenable number.

64531370412 is an abundant number, since it is smaller than the sum of its proper divisors (102795833268).

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

64531370412 is a wasteful number, since it uses less digits than its factorization.

64531370412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84479 (or 84471 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

Adding to 64531370412 its reverse (21407313546), we get a palindrome (85938683958).

The spelling of 64531370412 in words is "sixty-four billion, five hundred thirty-one million, three hundred seventy thousand, four hundred twelve".