37978415873 has 2 divisors, whose sum is σ = 37978415874. Its totient is φ = 37978415872.

The previous prime is 37978415851. The next prime is 37978415887. The reversal of 37978415873 is 37851487973.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37753655809 + 224760064 = 194303^2 + 14992^2 .

It is a cyclic number.

It is not a de Polignac number, because 37978415873 - 2¹² = 37978411777 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 (37978445873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18989207936 + 18989207937.

It is an arithmetic number, because the mean of its divisors is an integer number (18989207937).

Almost surely, 2^37978415873 is an apocalyptic number.

It is an amenable number.

37978415873 is a deficient number, since it is larger than the sum of its proper divisors (1).

37978415873 is an equidigital number, since it uses as much as digits as its factorization.

37978415873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35562240, while the sum is 62.

The spelling of 37978415873 in words is "thirty-seven billion, nine hundred seventy-eight million, four hundred fifteen thousand, eight hundred seventy-three".