1061000255857 has 4 divisors (see below), whose sum is σ = 1061004344320. Its totient is φ = 1060996167396.

The previous prime is 1061000255831. The next prime is 1061000255881. The reversal of 1061000255857 is 7585520001601.

It is a happy number.

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 not a de Polignac number, because 1061000255857 - 2⁷ = 1061000255729 is a prime.

It is a super-2 number, since 2×1061000255857² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1061000253857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1626513 + ... + 2183470.

It is an arithmetic number, because the mean of its divisors is an integer number (265251086080).

Almost surely, 2^{1061000255857} is an apocalyptic number.

It is an amenable number.

1061000255857 is a deficient number, since it is larger than the sum of its proper divisors (4088463).

1061000255857 is an equidigital number, since it uses as much as digits as its factorization.

1061000255857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088462.

The product of its (nonzero) digits is 84000, while the sum is 40.

The spelling of 1061000255857 in words is "one trillion, sixty-one billion, two hundred fifty-five thousand, eight hundred fifty-seven".