11778214881477 has 32 divisors (see below), whose sum is σ = 17487088704000. Its totient is φ = 6991236693440.

The previous prime is 11778214881421. The next prime is 11778214881481. The reversal of 11778214881477 is 77418841287711.

It is a cyclic number.

It is not a de Polignac number, because 11778214881477 - 2¹² = 11778214877381 is a prime.

It is a super-2 number, since 2×11778214881477² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778214831477) 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 31 ways as a sum of consecutive naturals, for example, 10720527 + ... + 11768012.

It is an arithmetic number, because the mean of its divisors is an integer number (546471522000).

Almost surely, 2^{11778214881477} is an apocalyptic number.

It is an amenable number.

11778214881477 is a deficient number, since it is larger than the sum of its proper divisors (5708873822523).

11778214881477 is a wasteful number, since it uses less digits than its factorization.

11778214881477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22488881.

The product of its digits is 39337984, while the sum is 66.

The spelling of 11778214881477 in words is "eleven trillion, seven hundred seventy-eight billion, two hundred fourteen million, eight hundred eighty-one thousand, four hundred seventy-seven".