7626384851281 has 15 divisors (see below), whose sum is σ = 8897077468041. Its totient is φ = 6536785314276.

The previous prime is 7626384851279. The next prime is 7626384851287. The reversal of 7626384851281 is 1821584836267.

The square root of 7626384851281 is 2761591.

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

It is not a de Polignac number, because 7626384851281 - 2¹ = 7626384851279 is a prime.

It is a super-2 number, since 2×7626384851281² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7626384851287) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 135289780 + ... + 135346138.

Almost surely, 2^{7626384851281} is an apocalyptic number.

7626384851281 is the 2761591-st square number.

7626384851281 is the 1380796-th centered octagonal number.

It is an amenable number.

7626384851281 is a deficient number, since it is larger than the sum of its proper divisors (1270692616760).

7626384851281 is an frugal number, since it uses more digits than its factorization.

7626384851281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112746 (or 56366 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 61.

The spelling of 7626384851281 in words is "seven trillion, six hundred twenty-six billion, three hundred eighty-four million, eight hundred fifty-one thousand, two hundred eighty-one".