64618028869156 has 27 divisors (see below), whose sum is σ = 131544073582257. Its totient is φ = 27693392712720.

The previous prime is 64618028869063. The next prime is 64618028869187. The reversal of 64618028869156 is 65196882081646.

It is a happy number.

The square root of 64618028869156 is 8038534.

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

It can be written as a sum of positive squares in only one way, i.e., 10344161142756 + 54273867726400 = 3216234^2 + 7367080^2 .

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors.

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 8 ways as a sum of consecutive naturals, for example, 112252386 + ... + 112826566.

Almost surely, 2^{64618028869156} is an apocalyptic number.

64618028869156 is the 8038534-th square number.

It is an amenable number.

64618028869156 is an abundant number, since it is smaller than the sum of its proper divisors (66926044713101).

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

64618028869156 is an frugal number, since it uses more digits than its factorization.

64618028869156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148380 (or 574190 counting only the distinct ones).

The product of its (nonzero) digits is 238878720, while the sum is 70.

The spelling of 64618028869156 in words is "sixty-four trillion, six hundred eighteen billion, twenty-eight million, eight hundred sixty-nine thousand, one hundred fifty-six".