64734231340 has 48 divisors (see below), whose sum is σ = 139769380800. Its totient is φ = 25166184192.

The previous prime is 64734231313. The next prime is 64734231391. The reversal of 64734231340 is 4313243746.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 64734231340.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632466 + ... + 727654.

It is an arithmetic number, because the mean of its divisors is an integer number (2911862100).

Almost surely, 2^64734231340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64734231340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69884690400).

64734231340 is an abundant number, since it is smaller than the sum of its proper divisors (75035149460).

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

64734231340 is a wasteful number, since it uses less digits than its factorization.

64734231340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96154 (or 96152 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 37.

The spelling of 64734231340 in words is "sixty-four billion, seven hundred thirty-four million, two hundred thirty-one thousand, three hundred forty".