27761438429 has 2 divisors, whose sum is σ = 27761438430. Its totient is φ = 27761438428.

The previous prime is 27761438407. The next prime is 27761438461. The reversal of 27761438429 is 92483416772.

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., 24547682329 + 3213756100 = 156677^2 + 56690^2 .

It is a cyclic number.

It is not a de Polignac number, because 27761438429 - 2¹⁶ = 27761372893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27761438729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13880719214 + 13880719215.

It is an arithmetic number, because the mean of its divisors is an integer number (13880719215).

Almost surely, 2^27761438429 is an apocalyptic number.

It is an amenable number.

27761438429 is a deficient number, since it is larger than the sum of its proper divisors (1).

27761438429 is an equidigital number, since it uses as much as digits as its factorization.

27761438429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 53.

The spelling of 27761438429 in words is "twenty-seven billion, seven hundred sixty-one million, four hundred thirty-eight thousand, four hundred twenty-nine".