55149431481 has 12 divisors (see below), whose sum is σ = 80849250352. Its totient is φ = 36217536696.

The previous prime is 55149431479. The next prime is 55149431497. The reversal of 55149431481 is 18413494155.

55149431481 is a `hidden beast` number, since 5 + 51 + 4 + 94 + 31 + 481 = 666.

It is not a de Polignac number, because 55149431481 - 2¹ = 55149431479 is a prime.

It is a super-2 number, since 2×55149431481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55149431461) 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, 45728611 + ... + 45729816.

Almost surely, 2^55149431481 is an apocalyptic number.

It is an amenable number.

55149431481 is a deficient number, since it is larger than the sum of its proper divisors (25699818871).

55149431481 is a wasteful number, since it uses less digits than its factorization.

55149431481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91458500 (or 91458497 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 55149431481 in words is "fifty-five billion, one hundred forty-nine million, four hundred thirty-one thousand, four hundred eighty-one".