7651768389489 has 81 divisors (see below), whose sum is σ = 12954907540107. Its totient is φ = 4339410854688.

The previous prime is 7651768389481. The next prime is 7651768389509. The reversal of 7651768389489 is 9849838671567.

The square root of 7651768389489 is 2766183.

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

7651768389489 is a `hidden beast` number, since 7 + 6 + 51 + 7 + 6 + 8 + 3 + 89 + 489 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2242850688225 + 5408917701264 = 1497615^2 + 2325708^2 .

It is not a de Polignac number, because 7651768389489 - 2³ = 7651768389481 is a prime.

It is a super-2 number, since 2×7651768389489² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7651768389481) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 9120104932 + ... + 9120105770.

Almost surely, 2^{7651768389489} is an apocalyptic number.

7651768389489 is the 2766183-rd square number.

7651768389489 is the 1383092-nd centered octagonal number.

It is an amenable number.

7651768389489 is a deficient number, since it is larger than the sum of its proper divisors (5303139150618).

7651768389489 is an frugal number, since it uses more digits than its factorization.

7651768389489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012 (or 1006 counting only the distinct ones).

The product of its digits is 4389396480, while the sum is 81.

Multiplying 7651768389489 by its sum of digits (81), we get a square (619793239548609 = 24895647²).

The spelling of 7651768389489 in words is "seven trillion, six hundred fifty-one billion, seven hundred sixty-eight million, three hundred eighty-nine thousand, four hundred eighty-nine".