1055507835821 has 8 divisors (see below), whose sum is σ = 1073742134400. Its totient is φ = 1037285015200.

The previous prime is 1055507835787. The next prime is 1055507835839. The reversal of 1055507835821 is 1285387055501.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1055507835821 is a prime.

It is a super-3 number, since 3×1055507835821³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1055507835821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055507835871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2683880 + ... + 3051921.

It is an arithmetic number, because the mean of its divisors is an integer number (134217766800).

Almost surely, 2^{1055507835821} is an apocalyptic number.

It is an amenable number.

1055507835821 is a deficient number, since it is larger than the sum of its proper divisors (18234298579).

1055507835821 is an equidigital number, since it uses as much as digits as its factorization.

1055507835821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5738979.

The product of its (nonzero) digits is 1680000, while the sum is 50.

The spelling of 1055507835821 in words is "one trillion, fifty-five billion, five hundred seven million, eight hundred thirty-five thousand, eight hundred twenty-one".