1246395045977 has 4 divisors (see below), whose sum is σ = 1247510888676. Its totient is φ = 1245279203280.

The previous prime is 1246395045953. The next prime is 1246395045979. The reversal of 1246395045977 is 7795405936421.

It is a happy number.

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 575995995136 + 670399050841 = 758944^2 + 818779^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246395045977 - 2³⁶ = 1177675569241 is a prime.

It is a super-2 number, since 2×1246395045977² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1246395045979) by changing a digit.

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, 557919674 + ... + 557921907.

It is an arithmetic number, because the mean of its divisors is an integer number (311877722169).

Almost surely, 2^{1246395045977} is an apocalyptic number.

It is an amenable number.

1246395045977 is a deficient number, since it is larger than the sum of its proper divisors (1115842699).

1246395045977 is a wasteful number, since it uses less digits than its factorization.

1246395045977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115842698.

The product of its (nonzero) digits is 57153600, while the sum is 62.

The spelling of 1246395045977 in words is "one trillion, two hundred forty-six billion, three hundred ninety-five million, forty-five thousand, nine hundred seventy-seven".