14778916429 has 2 divisors, whose sum is σ = 14778916430. Its totient is φ = 14778916428.

The previous prime is 14778916393. The next prime is 14778916447. The reversal of 14778916429 is 92461987741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13479674404 + 1299242025 = 116102^2 + 36045^2 .

It is a cyclic number.

It is not a de Polignac number, because 14778916429 - 2⁷ = 14778916301 is a prime.

It is a super-2 number, since 2×14778916429² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14778916489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7389458214 + 7389458215.

It is an arithmetic number, because the mean of its divisors is an integer number (7389458215).

Almost surely, 2^14778916429 is an apocalyptic number.

It is an amenable number.

14778916429 is a deficient number, since it is larger than the sum of its proper divisors (1).

14778916429 is an equidigital number, since it uses as much as digits as its factorization.

14778916429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 58.

The spelling of 14778916429 in words is "fourteen billion, seven hundred seventy-eight million, nine hundred sixteen thousand, four hundred twenty-nine".