73942505477 has 2 divisors, whose sum is σ = 73942505478. Its totient is φ = 73942505476.

The previous prime is 73942505423. The next prime is 73942505519. The reversal of 73942505477 is 77450524937.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50261604481 + 23680900996 = 224191^2 + 153886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73942505477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73942508477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36971252738 + 36971252739.

It is an arithmetic number, because the mean of its divisors is an integer number (36971252739).

Almost surely, 2^73942505477 is an apocalyptic number.

It is an amenable number.

73942505477 is a deficient number, since it is larger than the sum of its proper divisors (1).

73942505477 is an equidigital number, since it uses as much as digits as its factorization.

73942505477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7408800, while the sum is 53.

The spelling of 73942505477 in words is "seventy-three billion, nine hundred forty-two million, five hundred five thousand, four hundred seventy-seven".