380440377721 has 2 divisors, whose sum is σ = 380440377722. Its totient is φ = 380440377720.

The previous prime is 380440377671. The next prime is 380440377761. The reversal of 380440377721 is 127773044083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252802812025 + 127637565696 = 502795^2 + 357264^2 .

It is a cyclic number.

It is not a de Polignac number, because 380440377721 - 2¹⁷ = 380440246649 is a prime.

It is not a weakly prime, because it can be changed into another prime (380440377761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190220188860 + 190220188861.

It is an arithmetic number, because the mean of its divisors is an integer number (190220188861).

Almost surely, 2^380440377721 is an apocalyptic number.

It is an amenable number.

380440377721 is a deficient number, since it is larger than the sum of its proper divisors (1).

380440377721 is an equidigital number, since it uses as much as digits as its factorization.

380440377721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 46.

The spelling of 380440377721 in words is "three hundred eighty billion, four hundred forty million, three hundred seventy-seven thousand, seven hundred twenty-one".