378309996257 has 2 divisors, whose sum is σ = 378309996258. Its totient is φ = 378309996256.

The previous prime is 378309996217. The next prime is 378309996269. The reversal of 378309996257 is 752699903873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359137716961 + 19172279296 = 599281^2 + 138464^2 .

It is an emirp because it is prime and its reverse (752699903873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378309996257 - 2²² = 378305801953 is a prime.

It is not a weakly prime, because it can be changed into another prime (378309996217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189154998128 + 189154998129.

It is an arithmetic number, because the mean of its divisors is an integer number (189154998129).

Almost surely, 2^378309996257 is an apocalyptic number.

It is an amenable number.

378309996257 is a deficient number, since it is larger than the sum of its proper divisors (1).

378309996257 is an equidigital number, since it uses as much as digits as its factorization.

378309996257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 154314720, while the sum is 68.

The spelling of 378309996257 in words is "three hundred seventy-eight billion, three hundred nine million, nine hundred ninety-six thousand, two hundred fifty-seven".