1237394455345 has 4 divisors (see below), whose sum is σ = 1484873346420. Its totient is φ = 989915564272.

The previous prime is 1237394455333. The next prime is 1237394455417. The reversal of 1237394455345 is 5435544937321.

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 480835456929 + 756558998416 = 693423^2 + 869804^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1237394455345 is a prime.

It is a super-2 number, since 2×1237394455345² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123739445530 + ... + 123739445539.

It is an arithmetic number, because the mean of its divisors is an integer number (371218336605).

Almost surely, 2^{1237394455345} is an apocalyptic number.

It is an amenable number.

1237394455345 is a deficient number, since it is larger than the sum of its proper divisors (247478891075).

1237394455345 is an equidigital number, since it uses as much as digits as its factorization.

1237394455345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247478891074.

The product of its digits is 27216000, while the sum is 55.

The spelling of 1237394455345 in words is "one trillion, two hundred thirty-seven billion, three hundred ninety-four million, four hundred fifty-five thousand, three hundred forty-five".