38777440611947 has 2 divisors, whose sum is σ = 38777440611948. Its totient is φ = 38777440611946.

The previous prime is 38777440611919. The next prime is 38777440612021. The reversal of 38777440611947 is 74911604477783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38777440611947 - 2⁶ = 38777440611883 is a prime.

It is not a weakly prime, because it can be changed into another prime (38777440611647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19388720305973 + 19388720305974.

It is an arithmetic number, because the mean of its divisors is an integer number (19388720305974).

Almost surely, 2^{38777440611947} is an apocalyptic number.

38777440611947 is a deficient number, since it is larger than the sum of its proper divisors (1).

38777440611947 is an equidigital number, since it uses as much as digits as its factorization.

38777440611947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 199148544, while the sum is 68.

The spelling of 38777440611947 in words is "thirty-eight trillion, seven hundred seventy-seven billion, four hundred forty million, six hundred eleven thousand, nine hundred forty-seven".