1051055577861 has 4 divisors (see below), whose sum is σ = 1401407437152. Its totient is φ = 700703718572.

The previous prime is 1051055577857. The next prime is 1051055577863. The reversal of 1051055577861 is 1687755501501.

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 1051055577861 - 2² = 1051055577857 is a prime.

It is a super-2 number, since 2×1051055577861² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051055577863) 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 3 ways as a sum of consecutive naturals, for example, 175175929641 + ... + 175175929646.

It is an arithmetic number, because the mean of its divisors is an integer number (350351859288).

Almost surely, 2^{1051055577861} is an apocalyptic number.

It is an amenable number.

1051055577861 is a deficient number, since it is larger than the sum of its proper divisors (350351859291).

1051055577861 is an equidigital number, since it uses as much as digits as its factorization.

1051055577861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350351859290.

The product of its (nonzero) digits is 1470000, while the sum is 51.

The spelling of 1051055577861 in words is "one trillion, fifty-one billion, fifty-five million, five hundred seventy-seven thousand, eight hundred sixty-one".