1055545665 has 32 divisors (see below), whose sum is σ = 1782518400. Its totient is φ = 531901440.

The previous prime is 1055545661. The next prime is 1055545717. The reversal of 1055545665 is 5665455501.

It is not a de Polignac number, because 1055545665 - 2² = 1055545661 is a prime.

It is a super-2 number, since 2×1055545665² = 2228353301800584450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055545661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106105 + ... + 115625.

It is an arithmetic number, because the mean of its divisors is an integer number (55703700).

Almost surely, 2^1055545665 is an apocalyptic number.

1055545665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1055545665 is a deficient number, since it is larger than the sum of its proper divisors (726972735).

1055545665 is a wasteful number, since it uses less digits than its factorization.

1055545665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9937.

The product of its (nonzero) digits is 450000, while the sum is 42.

The square root of 1055545665 is about 32489.1622699016. The cubic root of 1055545665 is about 1018.1826105714.

It can be divided in two parts, 1055 and 545665, that multiplied together give a palindrome (575676575).

The spelling of 1055545665 in words is "one billion, fifty-five million, five hundred forty-five thousand, six hundred sixty-five".