5178477881 has 4 divisors (see below), whose sum is σ = 5179179600. Its totient is φ = 5177776164.

The previous prime is 5178477859. The next prime is 5178477883. The reversal of 5178477881 is 1887748715.

5178477881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1887748715 = 5 ⋅377549743.

It is a cyclic number.

It is not a de Polignac number, because 5178477881 - 2¹⁸ = 5178215737 is a prime.

It is a super-2 number, since 2×5178477881² = 53633266328012500322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5178477883) 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, 339671 + ... + 354588.

It is an arithmetic number, because the mean of its divisors is an integer number (1294794900).

Almost surely, 2^5178477881 is an apocalyptic number.

It is an amenable number.

5178477881 is a deficient number, since it is larger than the sum of its proper divisors (701719).

5178477881 is an equidigital number, since it uses as much as digits as its factorization.

5178477881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701718.

The product of its digits is 3512320, while the sum is 56.

The square root of 5178477881 is about 71961.6417336347. The cubic root of 5178477881 is about 1730.0847387408.

The spelling of 5178477881 in words is "five billion, one hundred seventy-eight million, four hundred seventy-seven thousand, eight hundred eighty-one".