1233453166561 has 8 divisors (see below), whose sum is σ = 1537811740224. Its totient is φ = 961132337520.

The previous prime is 1233453166541. The next prime is 1233453166571. The reversal of 1233453166561 is 1656613543321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1233453166561 - 2¹³ = 1233453158369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1233453166531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8009436070 + ... + 8009436223.

It is an arithmetic number, because the mean of its divisors is an integer number (192226467528).

Almost surely, 2^{1233453166561} is an apocalyptic number.

1233453166561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1233453166561 is a deficient number, since it is larger than the sum of its proper divisors (304358573663).

1233453166561 is a wasteful number, since it uses less digits than its factorization.

1233453166561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16018872311.

The product of its digits is 1166400, while the sum is 46.

The spelling of 1233453166561 in words is "one trillion, two hundred thirty-three billion, four hundred fifty-three million, one hundred sixty-six thousand, five hundred sixty-one".