1082256816521 has 8 divisors (see below), whose sum is σ = 1085414344200. Its totient is φ = 1079102610432.

The previous prime is 1082256816493. The next prime is 1082256816533. The reversal of 1082256816521 is 1256186522801.

It can be written as a sum of positive squares in 4 ways, for example, as 181655816521 + 900601000000 = 426211^2 + 949000^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1082256816521 - 2⁶ = 1082256816457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1082256810521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177050 + ... + 1481843.

It is an arithmetic number, because the mean of its divisors is an integer number (135676793025).

Almost surely, 2^{1082256816521} is an apocalyptic number.

It is an amenable number.

1082256816521 is a deficient number, since it is larger than the sum of its proper divisors (3157527679).

1082256816521 is a wasteful number, since it uses less digits than its factorization.

1082256816521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660795.

The product of its (nonzero) digits is 460800, while the sum is 47.

The spelling of 1082256816521 in words is "one trillion, eighty-two billion, two hundred fifty-six million, eight hundred sixteen thousand, five hundred twenty-one".