1083387457881 has 45 divisors (see below), whose sum is σ = 1719445960111. Its totient is φ = 679672600128.

The previous prime is 1083387457853. The next prime is 1083387457883. The reversal of 1083387457881 is 1887547833801.

The square root of 1083387457881 is 1040859.

It is a perfect power (a square), and thus also a powerful number.

1083387457881 is a `hidden beast` number, since 108 + 3 + 387 + 4 + 5 + 78 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 843467744025 + 239919713856 = 918405^2 + 489816^2 .

It is not a de Polignac number, because 1083387457881 - 2¹¹ = 1083387455833 is a prime.

It is a super-2 number, since 2×1083387457881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1083387457883) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 159248026 + ... + 159254828.

Almost surely, 2^{1083387457881} is an apocalyptic number.

1083387457881 is the 1040859-th square number.

1083387457881 is the 520430-th centered octagonal number.

It is an amenable number.

1083387457881 is a deficient number, since it is larger than the sum of its proper divisors (636058502230).

1083387457881 is an frugal number, since it uses more digits than its factorization.

1083387457881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13652 (or 6823 counting only the distinct ones).

The product of its (nonzero) digits is 36126720, while the sum is 63.

The spelling of 1083387457881 in words is "one trillion, eighty-three billion, three hundred eighty-seven million, four hundred fifty-seven thousand, eight hundred eighty-one".