381088877257 has 4 divisors (see below), whose sum is σ = 415733320656. Its totient is φ = 346444433860.

The previous prime is 381088877207. The next prime is 381088877263. The reversal of 381088877257 is 752778880183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381088877257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381088877207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17322221683 + ... + 17322221704.

It is an arithmetic number, because the mean of its divisors is an integer number (103933330164).

Almost surely, 2^381088877257 is an apocalyptic number.

It is an amenable number.

381088877257 is a deficient number, since it is larger than the sum of its proper divisors (34644443399).

381088877257 is a wasteful number, since it uses less digits than its factorization.

381088877257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34644443398.

The product of its (nonzero) digits is 42147840, while the sum is 64.

The spelling of 381088877257 in words is "three hundred eighty-one billion, eighty-eight million, eight hundred seventy-seven thousand, two hundred fifty-seven".