1213863430057 has 4 divisors (see below), whose sum is σ = 1213933205716. Its totient is φ = 1213793654400.

The previous prime is 1213863430037. The next prime is 1213863430061. The reversal of 1213863430057 is 7500343683121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1020724275481 + 193139154576 = 1010309^2 + 439476^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213863430057 - 2³⁵ = 1179503691689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213863429995 and 1213863430022.

It is not an unprimeable number, because it can be changed into a prime (1213863430007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34861728 + ... + 34896529.

It is an arithmetic number, because the mean of its divisors is an integer number (303483301429).

Almost surely, 2^{1213863430057} is an apocalyptic number.

It is an amenable number.

1213863430057 is a deficient number, since it is larger than the sum of its proper divisors (69775659).

1213863430057 is an equidigital number, since it uses as much as digits as its factorization.

1213863430057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69775658.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 1213863430057 in words is "one trillion, two hundred thirteen billion, eight hundred sixty-three million, four hundred thirty thousand, fifty-seven".