1055615050561 has 4 divisors (see below), whose sum is σ = 1055634799572. Its totient is φ = 1055595301552.

The previous prime is 1055615050517. The next prime is 1055615050583. The reversal of 1055615050561 is 1650505165501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 956178888336 + 99436162225 = 977844^2 + 315335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055615050561 - 2²³ = 1055606661953 is a prime.

It is a super-2 number, since 2×1055615050561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055615060561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9794110 + ... + 9901303.

It is an arithmetic number, because the mean of its divisors is an integer number (263908699893).

Almost surely, 2^{1055615050561} is an apocalyptic number.

It is an amenable number.

1055615050561 is a deficient number, since it is larger than the sum of its proper divisors (19749011).

1055615050561 is an equidigital number, since it uses as much as digits as its factorization.

1055615050561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19749010.

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 1055615050561 in words is "one trillion, fifty-five billion, six hundred fifteen million, fifty thousand, five hundred sixty-one".