377985925381 has 2 divisors, whose sum is σ = 377985925382. Its totient is φ = 377985925380.

The previous prime is 377985925379. The next prime is 377985925453. The reversal of 377985925381 is 183529589773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223190104900 + 154795820481 = 472430^2 + 393441^2 .

It is a cyclic number.

It is not a de Polignac number, because 377985925381 - 2¹ = 377985925379 is a prime.

It is a super-3 number, since 3×377985925381³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 377985925379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (377985922381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 188992962690 + 188992962691.

It is an arithmetic number, because the mean of its divisors is an integer number (188992962691).

Almost surely, 2^377985925381 is an apocalyptic number.

It is an amenable number.

377985925381 is a deficient number, since it is larger than the sum of its proper divisors (1).

377985925381 is an equidigital number, since it uses as much as digits as its factorization.

377985925381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 114307200, while the sum is 67.

The spelling of 377985925381 in words is "three hundred seventy-seven billion, nine hundred eighty-five million, nine hundred twenty-five thousand, three hundred eighty-one".