378299734721 has 2 divisors, whose sum is σ = 378299734722. Its totient is φ = 378299734720.

The previous prime is 378299734697. The next prime is 378299734849. The reversal of 378299734721 is 127437992873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220372974721 + 157926760000 = 469439^2 + 397400^2 .

It is a cyclic number.

It is not a de Polignac number, because 378299734721 - 2¹⁰ = 378299733697 is a prime.

It is a super-2 number, since 2×378299734721² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (378299934721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189149867360 + 189149867361.

It is an arithmetic number, because the mean of its divisors is an integer number (189149867361).

Almost surely, 2^378299734721 is an apocalyptic number.

It is an amenable number.

378299734721 is a deficient number, since it is larger than the sum of its proper divisors (1).

378299734721 is an equidigital number, since it uses as much as digits as its factorization.

378299734721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32006016, while the sum is 62.

The spelling of 378299734721 in words is "three hundred seventy-eight billion, two hundred ninety-nine million, seven hundred thirty-four thousand, seven hundred twenty-one".