134477813821 has 12 divisors (see below), whose sum is σ = 145679126400. Its totient is φ = 124081248720.

The previous prime is 134477813801. The next prime is 134477813831. The reversal of 134477813821 is 128318774431.

It is a de Polignac number, because none of the positive numbers 2^k-134477813821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134477813801) 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 11 ways as a sum of consecutive naturals, for example, 239586 + ... + 571276.

It is an arithmetic number, because the mean of its divisors is an integer number (12139927200).

Almost surely, 2^134477813821 is an apocalyptic number.

It is an amenable number.

134477813821 is a deficient number, since it is larger than the sum of its proper divisors (11201312579).

134477813821 is a wasteful number, since it uses less digits than its factorization.

134477813821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334116 (or 334103 counting only the distinct ones).

The product of its digits is 903168, while the sum is 49.

The spelling of 134477813821 in words is "one hundred thirty-four billion, four hundred seventy-seven million, eight hundred thirteen thousand, eight hundred twenty-one".