55778449047 has 8 divisors (see below), whose sum is σ = 74379849600. Its totient is φ = 37181340600.

The previous prime is 55778449033. The next prime is 55778449049. The reversal of 55778449047 is 74094487755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55778449047 - 2⁴ = 55778449031 is a prime.

It is a super-2 number, since 2×55778449047² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55778449049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1042579 + ... + 1094772.

It is an arithmetic number, because the mean of its divisors is an integer number (9297481200).

Almost surely, 2^55778449047 is an apocalyptic number.

55778449047 is a deficient number, since it is larger than the sum of its proper divisors (18601400553).

55778449047 is a wasteful number, since it uses less digits than its factorization.

55778449047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146053.

The product of its (nonzero) digits is 39513600, while the sum is 60.

The spelling of 55778449047 in words is "fifty-five billion, seven hundred seventy-eight million, four hundred forty-nine thousand, forty-seven".