1051847885721 has 32 divisors (see below), whose sum is σ = 1505023833600. Its totient is φ = 652176645120.

The previous prime is 1051847885681. The next prime is 1051847885771. The reversal of 1051847885721 is 1275887481501.

It is not a de Polignac number, because 1051847885721 - 2⁶ = 1051847885657 is a prime.

It is a super-2 number, since 2×1051847885721² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1051847885771) 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 31 ways as a sum of consecutive naturals, for example, 1584556 + ... + 2148141.

It is an arithmetic number, because the mean of its divisors is an integer number (47031994800).

Almost surely, 2^{1051847885721} is an apocalyptic number.

It is an amenable number.

1051847885721 is a deficient number, since it is larger than the sum of its proper divisors (453175947879).

1051847885721 is a wasteful number, since it uses less digits than its factorization.

1051847885721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732849.

The product of its (nonzero) digits is 5017600, while the sum is 57.

The spelling of 1051847885721 in words is "one trillion, fifty-one billion, eight hundred forty-seven million, eight hundred eighty-five thousand, seven hundred twenty-one".