654170380864 has 567 divisors, whose sum is σ = 1815285786363. Its totient is φ = 232936704000.

The previous prime is 654170380861. The next prime is 654170380883. The reversal of 654170380864 is 468083071456.

The square root of 654170380864 is 808808.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 24674126400 + 629496254464 = 157080^2 + 793408^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (654170380861) by changing a digit.

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 80 ways as a sum of consecutive naturals, for example, 6476934414 + ... + 6476934514.

Almost surely, 2^654170380864 is an apocalyptic number.

654170380864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

654170380864 is the 808808-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654170380864

654170380864 is an abundant number, since it is smaller than the sum of its proper divisors (1161115405499).

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

654170380864 is a wasteful number, since it uses less digits than its factorization.

654170380864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 654170380864 in words is "six hundred fifty-four billion, one hundred seventy million, three hundred eighty thousand, eight hundred sixty-four".