77059493081 has 2 divisors, whose sum is σ = 77059493082. Its totient is φ = 77059493080.

The previous prime is 77059493053. The next prime is 77059493099. The reversal of 77059493081 is 18039495077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47504382025 + 29555111056 = 217955^2 + 171916^2 .

It is a cyclic number.

It is not a de Polignac number, because 77059493081 - 2¹⁰ = 77059492057 is a prime.

It is a super-2 number, since 2×77059493081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77059493881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38529746540 + 38529746541.

It is an arithmetic number, because the mean of its divisors is an integer number (38529746541).

Almost surely, 2^77059493081 is an apocalyptic number.

It is an amenable number.

77059493081 is a deficient number, since it is larger than the sum of its proper divisors (1).

77059493081 is an equidigital number, since it uses as much as digits as its factorization.

77059493081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 77059493081 in words is "seventy-seven billion, fifty-nine million, four hundred ninety-three thousand, eighty-one".