55578771903 has 16 divisors (see below), whose sum is σ = 75548404736. Its totient is φ = 36335787840.

The previous prime is 55578771901. The next prime is 55578771947. The reversal of 55578771903 is 30917787555.

55578771903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55578771903 - 2¹ = 55578771901 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 (55578771901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575158 + ... + 664803.

It is an arithmetic number, because the mean of its divisors is an integer number (4721775296).

Almost surely, 2^55578771903 is an apocalyptic number.

55578771903 is a deficient number, since it is larger than the sum of its proper divisors (19969632833).

55578771903 is a wasteful number, since it uses less digits than its factorization.

55578771903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240254.

The product of its (nonzero) digits is 9261000, while the sum is 57.

The spelling of 55578771903 in words is "fifty-five billion, five hundred seventy-eight million, seven hundred seventy-one thousand, nine hundred three".