378876400109 has 2 divisors, whose sum is σ = 378876400110. Its totient is φ = 378876400108.

The previous prime is 378876400033. The next prime is 378876400117. The reversal of 378876400109 is 901004678873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315433873225 + 63442526884 = 561635^2 + 251878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378876400109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378876400909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189438200054 + 189438200055.

It is an arithmetic number, because the mean of its divisors is an integer number (189438200055).

Almost surely, 2^378876400109 is an apocalyptic number.

It is an amenable number.

378876400109 is a deficient number, since it is larger than the sum of its proper divisors (1).

378876400109 is an equidigital number, since it uses as much as digits as its factorization.

378876400109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 378876400109 in words is "three hundred seventy-eight billion, eight hundred seventy-six million, four hundred thousand, one hundred nine".