1243530451155 has 8 divisors (see below), whose sum is σ = 1989648721872. Its totient is φ = 663216240608.

The previous prime is 1243530451133. The next prime is 1243530451169. The reversal of 1243530451155 is 5511540353421.

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 1243530451155 - 2¹⁰ = 1243530450131 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41451015024 + ... + 41451015053.

It is an arithmetic number, because the mean of its divisors is an integer number (248706090234).

Almost surely, 2^{1243530451155} is an apocalyptic number.

1243530451155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1243530451155 is a deficient number, since it is larger than the sum of its proper divisors (746118270717).

1243530451155 is an equidigital number, since it uses as much as digits as its factorization.

1243530451155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82902030085.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 1243530451155 in words is "one trillion, two hundred forty-three billion, five hundred thirty million, four hundred fifty-one thousand, one hundred fifty-five".