378451906493 has 2 divisors, whose sum is σ = 378451906494. Its totient is φ = 378451906492.

The previous prime is 378451906457. The next prime is 378451906517. The reversal of 378451906493 is 394609154873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 330518058649 + 47933847844 = 574907^2 + 218938^2 .

It is a cyclic number.

It is not a de Polignac number, because 378451906493 - 2⁸ = 378451906237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378451906993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189225953246 + 189225953247.

It is an arithmetic number, because the mean of its divisors is an integer number (189225953247).

Almost surely, 2^378451906493 is an apocalyptic number.

It is an amenable number.

378451906493 is a deficient number, since it is larger than the sum of its proper divisors (1).

378451906493 is an equidigital number, since it uses as much as digits as its factorization.

378451906493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19595520, while the sum is 59.

The spelling of 378451906493 in words is "three hundred seventy-eight billion, four hundred fifty-one million, nine hundred six thousand, four hundred ninety-three".