1081957671 has 24 divisors (see below), whose sum is σ = 1591237440. Its totient is φ = 708235200.

The previous prime is 1081957633. The next prime is 1081957699. The reversal of 1081957671 is 1767591801.

1081957671 is a `hidden beast` number, since 1 + 0 + 8 + 1 + 9 + 576 + 71 = 666.

It is not a de Polignac number, because 1081957671 - 2²² = 1077763367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081957621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393361 + ... + 396101.

It is an arithmetic number, because the mean of its divisors is an integer number (66301560).

Almost surely, 2^1081957671 is an apocalyptic number.

1081957671 is a deficient number, since it is larger than the sum of its proper divisors (509279769).

1081957671 is a wasteful number, since it uses less digits than its factorization.

1081957671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3527 (or 3524 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 45.

The square root of 1081957671 is about 32893.1249807616. The cubic root of 1081957671 is about 1026.6051142447.

The spelling of 1081957671 in words is "one billion, eighty-one million, nine hundred fifty-seven thousand, six hundred seventy-one".