64276748927664 has 640 divisors, whose sum is σ = 208367111651328. Its totient is φ = 16623331246080.

The previous prime is 64276748927659. The next prime is 64276748927681. The reversal of 64276748927664 is 46672984767246.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a self number, because there is not a number n which added to its sum of digits gives 64276748927664.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 60581289694 + ... + 60581290754.

Almost surely, 2^{64276748927664} 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 64276748927664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104183555825664).

64276748927664 is an abundant number, since it is smaller than the sum of its proper divisors (144090362723664).

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

64276748927664 is a wasteful number, since it uses less digits than its factorization.

64276748927664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085 (or 2079 counting only the distinct ones).

The product of its digits is 8193540096, while the sum is 78.

The spelling of 64276748927664 in words is "sixty-four trillion, two hundred seventy-six billion, seven hundred forty-eight million, nine hundred twenty-seven thousand, six hundred sixty-four".