7651016981 has 2 divisors, whose sum is σ = 7651016982. Its totient is φ = 7651016980.

The previous prime is 7651016903. The next prime is 7651017007. The reversal of 7651016981 is 1896101567.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3873070756 + 3777946225 = 62234^2 + 61465^2 .

It is a cyclic number.

It is not a de Polignac number, because 7651016981 - 2¹⁴ = 7651000597 is a prime.

It is a super-2 number, since 2×7651016981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7651016081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3825508490 + 3825508491.

It is an arithmetic number, because the mean of its divisors is an integer number (3825508491).

Almost surely, 2^7651016981 is an apocalyptic number.

It is an amenable number.

7651016981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7651016981 is an equidigital number, since it uses as much as digits as its factorization.

7651016981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 7651016981 is about 87470.0919228967. The cubic root of 7651016981 is about 1970.4846464079.

The spelling of 7651016981 in words is "seven billion, six hundred fifty-one million, sixteen thousand, nine hundred eighty-one".