765651250225 has 9 divisors (see below), whose sum is σ = 949412975403. Its totient is φ = 612517500120.

The previous prime is 765651250223. The next prime is 765651250271. The reversal of 765651250225 is 522052156567.

The square root of 765651250225 is 875015.

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., 275634450081 + 490016800144 = 525009^2 + 700012^2 .

It is not a de Polignac number, because 765651250225 - 2¹ = 765651250223 is a prime.

It is a super-2 number, since 2×765651250225² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (765651250223) 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 8 ways as a sum of consecutive naturals, for example, 4287574 + ... + 4462576.

Almost surely, 2^765651250225 is an apocalyptic number.

765651250225 is the 875015-th square number.

765651250225 is the 437508-th centered octagonal number.

It is an amenable number.

765651250225 is a deficient number, since it is larger than the sum of its proper divisors (183761725178).

765651250225 is an frugal number, since it uses more digits than its factorization.

765651250225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350016 (or 175008 counting only the distinct ones).

The product of its (nonzero) digits is 1260000, while the sum is 46.

The spelling of 765651250225 in words is "seven hundred sixty-five billion, six hundred fifty-one million, two hundred fifty thousand, two hundred twenty-five".