1055510500561 has 16 divisors (see below), whose sum is σ = 1178410559040. Its totient is φ = 937107501120.

The previous prime is 1055510500549. The next prime is 1055510500601. The reversal of 1055510500561 is 1650050155501.

It is a cyclic number.

It is not a de Polignac number, because 1055510500561 - 2⁹ = 1055510500049 is a prime.

It is a super-2 number, since 2×1055510500561² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055510500361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3276835 + ... + 3584503.

It is an arithmetic number, because the mean of its divisors is an integer number (73650659940).

Almost surely, 2^{1055510500561} is an apocalyptic number.

1055510500561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1055510500561 is a deficient number, since it is larger than the sum of its proper divisors (122900058479).

1055510500561 is a wasteful number, since it uses less digits than its factorization.

1055510500561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314976.

The product of its (nonzero) digits is 18750, while the sum is 34.

The spelling of 1055510500561 in words is "one trillion, fifty-five billion, five hundred ten million, five hundred thousand, five hundred sixty-one".