37978665827 has 2 divisors, whose sum is σ = 37978665828. Its totient is φ = 37978665826.

The previous prime is 37978665779. The next prime is 37978665871. The reversal of 37978665827 is 72856687973.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 37978665827 - 2¹⁶ = 37978600291 is a prime.

It is not a weakly prime, because it can be changed into another prime (37978665427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18989332913 + 18989332914.

It is an arithmetic number, because the mean of its divisors is an integer number (18989332914).

Almost surely, 2^37978665827 is an apocalyptic number.

37978665827 is a deficient number, since it is larger than the sum of its proper divisors (1).

37978665827 is an equidigital number, since it uses as much as digits as its factorization.

37978665827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 213373440, while the sum is 68.

The spelling of 37978665827 in words is "thirty-seven billion, nine hundred seventy-eight million, six hundred sixty-five thousand, eight hundred twenty-seven".