1256648463477 has 24 divisors (see below), whose sum is σ = 1980324197280. Its totient is φ = 761547106080.

The previous prime is 1256648463437. The next prime is 1256648463487. The reversal of 1256648463477 is 7743648466521.

1256648463477 is a `hidden beast` number, since 1 + 2 + 5 + 66 + 48 + 4 + 63 + 477 = 666.

It is not a de Polignac number, because 1256648463477 - 2³¹ = 1254500979829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256648463407) 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 23 ways as a sum of consecutive naturals, for example, 840718 + ... + 1794464.

It is an arithmetic number, because the mean of its divisors is an integer number (82513508220).

Almost surely, 2^{1256648463477} is an apocalyptic number.

It is an amenable number.

1256648463477 is a deficient number, since it is larger than the sum of its proper divisors (723675733803).

1256648463477 is a wasteful number, since it uses less digits than its factorization.

1256648463477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967073 (or 967070 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 63.

The spelling of 1256648463477 in words is "one trillion, two hundred fifty-six billion, six hundred forty-eight million, four hundred sixty-three thousand, four hundred seventy-seven".