1306245011378 has 4 divisors (see below), whose sum is σ = 1959367517070. Its totient is φ = 653122505688.

The previous prime is 1306245011369. The next prime is 1306245011419. The reversal of 1306245011378 is 8731105426031.

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

It can be written as a sum of positive squares in only one way, i.e., 663789861289 + 642455150089 = 814733^2 + 801533^2 .

It is a super-2 number, since 2×1306245011378² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326561252843 + ... + 326561252846.

Almost surely, 2^{1306245011378} is an apocalyptic number.

1306245011378 is a deficient number, since it is larger than the sum of its proper divisors (653122505692).

1306245011378 is an equidigital number, since it uses as much as digits as its factorization.

1306245011378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653122505691.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 1306245011378 in words is "one trillion, three hundred six billion, two hundred forty-five million, eleven thousand, three hundred seventy-eight".