378890468381881 has 7 divisors (see below), whose sum is σ = 380304238786291. Its totient is φ = 377481953629532.

The previous prime is 378890468381869. The next prime is 378890468381891. The reversal of 378890468381881 is 188183864098873.

The square root of 378890468381881 is 19465109.

The cubic root of 378890468381881 is 72361.

It is a perfect power (a square, a cube, a 6-th power), and thus also a powerful number.

It can be written as a sum of positive squares in 3 ways, for example, as 186723780125481 + 192166688256400 = 13664691^2 + 13862420^2 .

It is not a de Polignac number, because 378890468381881 - 2⁷ = 378890468381753 is a prime.

It is a super-2 number, since 2×378890468381881² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 378890468381795 and 378890468381804.

It is not an unprimeable number, because it can be changed into a prime (378890468381801) by changing a digit.

It is a polite number, since it can be written in 6 ways as a sum of consecutive naturals, for example, 1408514752215 + ... + 1408514752483.

Almost surely, 2^{378890468381881} is an apocalyptic number.

378890468381881 is the 19465109-th square number.

378890468381881 is the 9732555-th centered octagonal number.

It is an amenable number.

378890468381881 is a deficient number, since it is larger than the sum of its proper divisors (1413770404410).

378890468381881 is an frugal number, since it uses more digits than its factorization.

378890468381881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 3567255552, while the sum is 82.

The spelling of 378890468381881 in words is "three hundred seventy-eight trillion, eight hundred ninety billion, four hundred sixty-eight million, three hundred eighty-one thousand, eight hundred eighty-one".