9057811381 has 4 divisors (see below), whose sum is σ = 9302617132. Its totient is φ = 8813005632.

The previous prime is 9057811379. The next prime is 9057811409. The reversal of 9057811381 is 1831187509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1831187509 = 2797 ⋅654697.

It can be written as a sum of positive squares in 2 ways, for example, as 4465580625 + 4592230756 = 66825^2 + 67766^2 .

It is a cyclic number.

It is not a de Polignac number, because 9057811381 - 2¹ = 9057811379 is a prime.

It is a super-2 number, since 2×9057811381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9057811181) 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, 122402820 + ... + 122402893.

It is an arithmetic number, because the mean of its divisors is an integer number (2325654283).

Almost surely, 2^9057811381 is an apocalyptic number.

It is an amenable number.

9057811381 is a deficient number, since it is larger than the sum of its proper divisors (244805751).

9057811381 is a wasteful number, since it uses less digits than its factorization.

9057811381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244805750.

The product of its (nonzero) digits is 60480, while the sum is 43.

The square root of 9057811381 is about 95172.5348039023. The cubic root of 9057811381 is about 2084.5281176142.

The spelling of 9057811381 in words is "nine billion, fifty-seven million, eight hundred eleven thousand, three hundred eighty-one".