378841480981 has 2 divisors, whose sum is σ = 378841480982. Its totient is φ = 378841480980.

The previous prime is 378841480973. The next prime is 378841481033. The reversal of 378841480981 is 189084148873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214244933956 + 164596547025 = 462866^2 + 405705^2 .

It is a cyclic number.

It is not a de Polignac number, because 378841480981 - 2³ = 378841480973 is a prime.

It is a super-2 number, since 2×378841480981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378841480921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189420740490 + 189420740491.

It is an arithmetic number, because the mean of its divisors is an integer number (189420740491).

Almost surely, 2^378841480981 is an apocalyptic number.

It is an amenable number.

378841480981 is a deficient number, since it is larger than the sum of its proper divisors (1).

378841480981 is an equidigital number, since it uses as much as digits as its factorization.

378841480981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12386304, while the sum is 61.

The spelling of 378841480981 in words is "three hundred seventy-eight billion, eight hundred forty-one million, four hundred eighty thousand, nine hundred eighty-one".