38431444477 has 2 divisors, whose sum is σ = 38431444478. Its totient is φ = 38431444476.

The previous prime is 38431444463. The next prime is 38431444481. The reversal of 38431444477 is 77444413483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34588188441 + 3843256036 = 185979^2 + 61994^2 .

It is a cyclic number.

It is not a de Polignac number, because 38431444477 - 2³⁵ = 4071706109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38431444477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38431444277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19215722238 + 19215722239.

It is an arithmetic number, because the mean of its divisors is an integer number (19215722239).

Almost surely, 2^38431444477 is an apocalyptic number.

It is an amenable number.

38431444477 is a deficient number, since it is larger than the sum of its proper divisors (1).

38431444477 is an equidigital number, since it uses as much as digits as its factorization.

38431444477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3612672, while the sum is 49.

The spelling of 38431444477 in words is "thirty-eight billion, four hundred thirty-one million, four hundred forty-four thousand, four hundred seventy-seven".