65139290176 has 63 divisors (see below), whose sum is σ = 131666297373. Its totient is φ = 31974462720.

The previous prime is 65139290149. The next prime is 65139290207. The reversal of 65139290176 is 67109293156.

The square root of 65139290176 is 255224.

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., 2118208576 + 63021081600 = 46024^2 + 251040^2 .

It is a super-2 number, since 2×65139290176² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 124549051 + ... + 124549573.

Almost surely, 2^65139290176 is an apocalyptic number.

65139290176 is the 255224-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65139290176

65139290176 is an abundant number, since it is smaller than the sum of its proper divisors (66527007197).

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

65139290176 is an frugal number, since it uses more digits than its factorization.

65139290176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 49.

Multiplying 65139290176 by its sum of digits (49), we get a square (3191825218624 = 1786568²).

The spelling of 65139290176 in words is "sixty-five billion, one hundred thirty-nine million, two hundred ninety thousand, one hundred seventy-six".