1055556924409 has 9 divisors (see below), whose sum is σ = 1143013972719. Its totient is φ = 974347909080.

The previous prime is 1055556924403. The next prime is 1055556924427. The reversal of 1055556924409 is 9044296555501.

The square root of 1055556924409 is 1027403.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 156147474025 + 899409450384 = 395155^2 + 948372^2 .

It is not a de Polignac number, because 1055556924409 - 2⁷ = 1055556924281 is a prime.

It is a super-2 number, since 2×1055556924409² (a number of 25 digits) contains 22 as substring.

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 1055556924409.

It is not an unprimeable number, because it can be changed into a prime (1055556924403) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13316724 + ... + 13395754.

Almost surely, 2^{1055556924409} is an apocalyptic number.

1055556924409 is the 1027403-rd square number.

1055556924409 is the 513702-nd centered octagonal number.

It is an amenable number.

1055556924409 is a deficient number, since it is larger than the sum of its proper divisors (87457048310).

1055556924409 is an frugal number, since it uses more digits than its factorization.

1055556924409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158088 (or 79044 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 55.

The spelling of 1055556924409 in words is "one trillion, fifty-five billion, five hundred fifty-six million, nine hundred twenty-four thousand, four hundred nine".