77692381469 has 2 divisors, whose sum is σ = 77692381470. Its totient is φ = 77692381468.

The previous prime is 77692381457. The next prime is 77692381519. The reversal of 77692381469 is 96418329677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52882981369 + 24809400100 = 229963^2 + 157510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77692381469 is a prime.

It is a super-2 number, since 2×77692381469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77692383469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38846190734 + 38846190735.

It is an arithmetic number, because the mean of its divisors is an integer number (38846190735).

Almost surely, 2^77692381469 is an apocalyptic number.

It is an amenable number.

77692381469 is a deficient number, since it is larger than the sum of its proper divisors (1).

77692381469 is an equidigital number, since it uses as much as digits as its factorization.

77692381469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 62.

The spelling of 77692381469 in words is "seventy-seven billion, six hundred ninety-two million, three hundred eighty-one thousand, four hundred sixty-nine".