76617381881 has 2 divisors, whose sum is σ = 76617381882. Its totient is φ = 76617381880.

The previous prime is 76617381847. The next prime is 76617381917. The reversal of 76617381881 is 18818371667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72262041856 + 4355340025 = 268816^2 + 65995^2 .

It is an emirp because it is prime and its reverse (18818371667) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76617381881 is a prime.

It is a super-2 number, since 2×76617381881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (76617389881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38308690940 + 38308690941.

It is an arithmetic number, because the mean of its divisors is an integer number (38308690941).

Almost surely, 2^76617381881 is an apocalyptic number.

It is an amenable number.

76617381881 is a deficient number, since it is larger than the sum of its proper divisors (1).

76617381881 is an equidigital number, since it uses as much as digits as its factorization.

76617381881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 56.

The spelling of 76617381881 in words is "seventy-six billion, six hundred seventeen million, three hundred eighty-one thousand, eight hundred eighty-one".