55903863557 has 4 divisors (see below), whose sum is σ = 57831583020. Its totient is φ = 53976144096.

The previous prime is 55903863551. The next prime is 55903863563. The reversal of 55903863557 is 75536830955.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55903863551) and next prime (55903863563).

It can be written as a sum of positive squares in 2 ways, for example, as 19956082756 + 35947780801 = 141266^2 + 189599^2 .

It is a cyclic number.

It is not a de Polignac number, because 55903863557 - 2¹⁰ = 55903862533 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 (55903863551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 963859688 + ... + 963859745.

It is an arithmetic number, because the mean of its divisors is an integer number (14457895755).

Almost surely, 2^55903863557 is an apocalyptic number.

It is an amenable number.

55903863557 is a deficient number, since it is larger than the sum of its proper divisors (1927719463).

55903863557 is a wasteful number, since it uses less digits than its factorization.

55903863557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927719462.

The product of its (nonzero) digits is 17010000, while the sum is 56.

The spelling of 55903863557 in words is "fifty-five billion, nine hundred three million, eight hundred sixty-three thousand, five hundred fifty-seven".