55477782493 has 4 divisors (see below), whose sum is σ = 63403180000. Its totient is φ = 47552384988.

The previous prime is 55477782487. The next prime is 55477782517. The reversal of 55477782493 is 39428777455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55477782493 - 2¹³ = 55477774301 is a prime.

It is a super-3 number, since 3×55477782493³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55477782413) 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, 3962698743 + ... + 3962698756.

It is an arithmetic number, because the mean of its divisors is an integer number (15850795000).

Almost surely, 2^55477782493 is an apocalyptic number.

It is an amenable number.

55477782493 is a deficient number, since it is larger than the sum of its proper divisors (7925397507).

55477782493 is an equidigital number, since it uses as much as digits as its factorization.

55477782493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7925397506.

The product of its digits is 59270400, while the sum is 61.

The spelling of 55477782493 in words is "fifty-five billion, four hundred seventy-seven million, seven hundred eighty-two thousand, four hundred ninety-three".