38401408784477 has 2 divisors, whose sum is σ = 38401408784478. Its totient is φ = 38401408784476.

The previous prime is 38401408784369. The next prime is 38401408784503. The reversal of 38401408784477 is 77448780410483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28250436832996 + 10150971951481 = 5315114^2 + 3186059^2 .

It is a cyclic number.

It is not a de Polignac number, because 38401408784477 - 2²² = 38401404590173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38401408784777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19200704392238 + 19200704392239.

It is an arithmetic number, because the mean of its divisors is an integer number (19200704392239).

Almost surely, 2^{38401408784477} is an apocalyptic number.

It is an amenable number.

38401408784477 is a deficient number, since it is larger than the sum of its proper divisors (1).

38401408784477 is an equidigital number, since it uses as much as digits as its factorization.

38401408784477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 134873088, while the sum is 65.

The spelling of 38401408784477 in words is "thirty-eight trillion, four hundred one billion, four hundred eight million, seven hundred eighty-four thousand, four hundred seventy-seven".