77900532469 has 2 divisors, whose sum is σ = 77900532470. Its totient is φ = 77900532468.

The previous prime is 77900532407. The next prime is 77900532473. The reversal of 77900532469 is 96423500977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42051654225 + 35848878244 = 205065^2 + 189338^2 .

It is a cyclic number.

It is not a de Polignac number, because 77900532469 - 2³³ = 69310597877 is a prime.

It is a super-2 number, since 2×77900532469² (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 (77900562469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38950266234 + 38950266235.

It is an arithmetic number, because the mean of its divisors is an integer number (38950266235).

Almost surely, 2^77900532469 is an apocalyptic number.

It is an amenable number.

77900532469 is a deficient number, since it is larger than the sum of its proper divisors (1).

77900532469 is an equidigital number, since it uses as much as digits as its factorization.

77900532469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 52.

The spelling of 77900532469 in words is "seventy-seven billion, nine hundred million, five hundred thirty-two thousand, four hundred sixty-nine".