71409799477 has 2 divisors, whose sum is σ = 71409799478. Its totient is φ = 71409799476.

The previous prime is 71409799469. The next prime is 71409799523. The reversal of 71409799477 is 77499790417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45882068401 + 25527731076 = 214201^2 + 159774^2 .

It is a cyclic number.

It is not a de Polignac number, because 71409799477 - 2³ = 71409799469 is a prime.

It is a super-2 number, since 2×71409799477² (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 (71409799277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35704899738 + 35704899739.

It is an arithmetic number, because the mean of its divisors is an integer number (35704899739).

Almost surely, 2^71409799477 is an apocalyptic number.

It is an amenable number.

71409799477 is a deficient number, since it is larger than the sum of its proper divisors (1).

71409799477 is an equidigital number, since it uses as much as digits as its factorization.

71409799477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28005264, while the sum is 64.

The spelling of 71409799477 in words is "seventy-one billion, four hundred nine million, seven hundred ninety-nine thousand, four hundred seventy-seven".