378834552869 has 2 divisors, whose sum is σ = 378834552870. Its totient is φ = 378834552868.

The previous prime is 378834552851. The next prime is 378834552881. The reversal of 378834552869 is 968255438873.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 371788965025 + 7045587844 = 609745^2 + 83938^2 .

It is an emirp because it is prime and its reverse (968255438873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378834552869 - 2³⁶ = 310115076133 is a prime.

It is a super-2 number, since 2×378834552869² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 378834552799 and 378834552808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378234552869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189417276434 + 189417276435.

It is an arithmetic number, because the mean of its divisors is an integer number (189417276435).

Almost surely, 2^378834552869 is an apocalyptic number.

It is an amenable number.

378834552869 is a deficient number, since it is larger than the sum of its proper divisors (1).

378834552869 is an equidigital number, since it uses as much as digits as its factorization.

378834552869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 348364800, while the sum is 68.

The spelling of 378834552869 in words is "three hundred seventy-eight billion, eight hundred thirty-four million, five hundred fifty-two thousand, eight hundred sixty-nine".