7656854981 has 2 divisors, whose sum is σ = 7656854982. Its totient is φ = 7656854980.

The previous prime is 7656854963. The next prime is 7656855091. The reversal of 7656854981 is 1894586567.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7045084225 + 611770756 = 83935^2 + 24734^2 .

It is a cyclic number.

It is not a de Polignac number, because 7656854981 - 2³⁰ = 6583113157 is a prime.

It is a super-2 number, since 2×7656854981² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7656854981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7656854941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3828427490 + 3828427491.

It is an arithmetic number, because the mean of its divisors is an integer number (3828427491).

Almost surely, 2^7656854981 is an apocalyptic number.

It is an amenable number.

7656854981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7656854981 is an equidigital number, since it uses as much as digits as its factorization.

7656854981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 59.

The square root of 7656854981 is about 87503.4569659965. The cubic root of 7656854981 is about 1970.9857024428.

The spelling of 7656854981 in words is "seven billion, six hundred fifty-six million, eight hundred fifty-four thousand, nine hundred eighty-one".