64748840832 has 512 divisors, whose sum is σ = 219066624000. Its totient is φ = 18662400000.

The previous prime is 64748840809. The next prime is 64748840857. The reversal of 64748840832 is 23804884746.

It is a happy number.

64748840832 is a `hidden beast` number, since 6 + 47 + 488 + 40 + 83 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 86216457 + ... + 86217207.

It is an arithmetic number, because the mean of its divisors is an integer number (427864500).

Almost surely, 2^64748840832 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 64748840832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109533312000).

64748840832 is an abundant number, since it is smaller than the sum of its proper divisors (154317783168).

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

64748840832 is a wasteful number, since it uses less digits than its factorization.

64748840832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 54.

The spelling of 64748840832 in words is "sixty-four billion, seven hundred forty-eight million, eight hundred forty thousand, eight hundred thirty-two".