380926990781 has 2 divisors, whose sum is σ = 380926990782. Its totient is φ = 380926990780.

The previous prime is 380926990747. The next prime is 380926990793. The reversal of 380926990781 is 187099629083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 328453925881 + 52473064900 = 573109^2 + 229070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-380926990781 is a prime.

It is a super-2 number, since 2×380926990781² (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 (380926990711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190463495390 + 190463495391.

It is an arithmetic number, because the mean of its divisors is an integer number (190463495391).

Almost surely, 2^380926990781 is an apocalyptic number.

It is an amenable number.

380926990781 is a deficient number, since it is larger than the sum of its proper divisors (1).

380926990781 is an equidigital number, since it uses as much as digits as its factorization.

380926990781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 62.

The spelling of 380926990781 in words is "three hundred eighty billion, nine hundred twenty-six million, nine hundred ninety thousand, seven hundred eighty-one".