64910681732 has 48 divisors (see below), whose sum is σ = 131971663152. Its totient is φ = 27664465920.

The previous prime is 64910681723. The next prime is 64910681741. The reversal of 64910681732 is 23718601946.

It is an interprime number because it is at equal distance from previous prime (64910681723) and next prime (64910681741).

It can be written as a sum of positive squares in 8 ways, for example, as 330657856 + 64580023876 = 18184^2 + 254126^2 .

It is a super-3 number, since 3×64910681732³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 645869 + ... + 739572.

It is an arithmetic number, because the mean of its divisors is an integer number (2749409649).

Almost surely, 2^64910681732 is an apocalyptic number.

It is an amenable number.

64910681732 is an abundant number, since it is smaller than the sum of its proper divisors (67060981420).

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

64910681732 is a wasteful number, since it uses less digits than its factorization.

64910681732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385528 (or 1385526 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 64910681732 in words is "sixty-four billion, nine hundred ten million, six hundred eighty-one thousand, seven hundred thirty-two".