1125231505665 has 16 divisors (see below), whose sum is σ = 1830885163200. Its totient is φ = 589951884992.

The previous prime is 1125231505663. The next prime is 1125231505669. The reversal of 1125231505665 is 5665051325211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1125231505665 - 2¹ = 1125231505663 is a prime.

It is a super-2 number, since 2×1125231505665² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1125231505661) 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, 635723130 + ... + 635724899.

It is an arithmetic number, because the mean of its divisors is an integer number (114430322700).

Almost surely, 2^{1125231505665} is an apocalyptic number.

1125231505665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1125231505665 is a deficient number, since it is larger than the sum of its proper divisors (705653657535).

1125231505665 is a wasteful number, since it uses less digits than its factorization.

1125231505665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271448096.

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 1125231505665 in words is "one trillion, one hundred twenty-five billion, two hundred thirty-one million, five hundred five thousand, six hundred sixty-five".