1016778970393 has 2 divisors, whose sum is σ = 1016778970394. Its totient is φ = 1016778970392.

The previous prime is 1016778970351. The next prime is 1016778970409. The reversal of 1016778970393 is 3930798776101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012251295449 + 4527674944 = 1006107^2 + 67288^2 .

It is a cyclic number.

It is not a de Polignac number, because 1016778970393 - 2¹³ = 1016778962201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1016778970793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508389485196 + 508389485197.

It is an arithmetic number, because the mean of its divisors is an integer number (508389485197).

Almost surely, 2^{1016778970393} is an apocalyptic number.

It is an amenable number.

1016778970393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016778970393 is an equidigital number, since it uses as much as digits as its factorization.

1016778970393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12002256, while the sum is 61.

The spelling of 1016778970393 in words is "one trillion, sixteen billion, seven hundred seventy-eight million, nine hundred seventy thousand, three hundred ninety-three".