1261451360443 has 8 divisors (see below), whose sum is σ = 1264348210176. Its totient is φ = 1258554733800.

The previous prime is 1261451360441. The next prime is 1261451360459. The reversal of 1261451360443 is 3440631541621.

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 1261451360443 - 2¹ = 1261451360441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1261451360396 and 1261451360405.

It is not an unprimeable number, because it can be changed into a prime (1261451360441) 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, 17733678 + ... + 17804668.

It is an arithmetic number, because the mean of its divisors is an integer number (158043526272).

Almost surely, 2^{1261451360443} is an apocalyptic number.

1261451360443 is a deficient number, since it is larger than the sum of its proper divisors (2896849733).

1261451360443 is an equidigital number, since it uses as much as digits as its factorization.

1261451360443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111545.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 1261451360443 in words is "one trillion, two hundred sixty-one billion, four hundred fifty-one million, three hundred sixty thousand, four hundred forty-three".