378728490529 has 2 divisors, whose sum is σ = 378728490530. Its totient is φ = 378728490528.

The previous prime is 378728490523. The next prime is 378728490541. The reversal of 378728490529 is 925094827873.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343554238225 + 35174252304 = 586135^2 + 187548^2 .

It is a cyclic number.

It is not a de Polignac number, because 378728490529 - 2³⁷ = 241289537057 is a prime.

It is not a weakly prime, because it can be changed into another prime (378728490523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189364245264 + 189364245265.

It is an arithmetic number, because the mean of its divisors is an integer number (189364245265).

Almost surely, 2^378728490529 is an apocalyptic number.

It is an amenable number.

378728490529 is a deficient number, since it is larger than the sum of its proper divisors (1).

378728490529 is an equidigital number, since it uses as much as digits as its factorization.

378728490529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 378728490529 in words is "three hundred seventy-eight billion, seven hundred twenty-eight million, four hundred ninety thousand, five hundred twenty-nine".