55203404477783 has 4 divisors (see below), whose sum is σ = 55522499301528. Its totient is φ = 54884309654040.

The previous prime is 55203404477777. The next prime is 55203404477807. The reversal of 55203404477783 is 38777440430255.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55203404477783 - 2¹² = 55203404473687 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 (55203404477773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159547411613 + ... + 159547411958.

It is an arithmetic number, because the mean of its divisors is an integer number (13880624825382).

Almost surely, 2^{55203404477783} is an apocalyptic number.

55203404477783 is a deficient number, since it is larger than the sum of its proper divisors (319094823745).

55203404477783 is a wasteful number, since it uses less digits than its factorization.

55203404477783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319094823744.

The product of its (nonzero) digits is 79027200, while the sum is 59.

The spelling of 55203404477783 in words is "fifty-five trillion, two hundred three billion, four hundred four million, four hundred seventy-seven thousand, seven hundred eighty-three".