55405012649 has 16 divisors (see below), whose sum is σ = 64414569600. Its totient is φ = 46669628544.

The previous prime is 55405012627. The next prime is 55405012667. The reversal of 55405012649 is 94621050455.

It is not a de Polignac number, because 55405012649 - 2⁸ = 55405012393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55405012669) 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 15 ways as a sum of consecutive naturals, for example, 1324547 + ... + 1365735.

It is an arithmetic number, because the mean of its divisors is an integer number (4025910600).

Almost surely, 2^55405012649 is an apocalyptic number.

55405012649 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

55405012649 is a deficient number, since it is larger than the sum of its proper divisors (9009556951).

55405012649 is a wasteful number, since it uses less digits than its factorization.

55405012649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44512.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 55405012649 in words is "fifty-five billion, four hundred five million, twelve thousand, six hundred forty-nine".