38778751001 has 2 divisors, whose sum is σ = 38778751002. Its totient is φ = 38778751000.

The previous prime is 38778750979. The next prime is 38778751009. The reversal of 38778751001 is 10015787783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31131073600 + 7647677401 = 176440^2 + 87451^2 .

It is an emirp because it is prime and its reverse (10015787783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38778751001 - 2³⁴ = 21598881817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (38778751009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19389375500 + 19389375501.

It is an arithmetic number, because the mean of its divisors is an integer number (19389375501).

Almost surely, 2^38778751001 is an apocalyptic number.

It is an amenable number.

38778751001 is a deficient number, since it is larger than the sum of its proper divisors (1).

38778751001 is an equidigital number, since it uses as much as digits as its factorization.

38778751001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 329280, while the sum is 47.

The spelling of 38778751001 in words is "thirty-eight billion, seven hundred seventy-eight million, seven hundred fifty-one thousand, one".