1243123927355 has 16 divisors (see below), whose sum is σ = 1494183292704. Its totient is φ = 992877096960.

The previous prime is 1243123927321. The next prime is 1243123927369. The reversal of 1243123927355 is 5537293213421.

It is not a de Polignac number, because 1243123927355 - 2³² = 1238828960059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10065659 + ... + 10188411.

It is an arithmetic number, because the mean of its divisors is an integer number (93386455794).

Almost surely, 2^{1243123927355} is an apocalyptic number.

1243123927355 is a deficient number, since it is larger than the sum of its proper divisors (251059365349).

1243123927355 is a wasteful number, since it uses less digits than its factorization.

1243123927355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126046.

The product of its digits is 1360800, while the sum is 47.

The spelling of 1243123927355 in words is "one trillion, two hundred forty-three billion, one hundred twenty-three million, nine hundred twenty-seven thousand, three hundred fifty-five".