4991928155 has 4 divisors (see below), whose sum is σ = 5990313792. Its totient is φ = 3993542520.

The previous prime is 4991928103. The next prime is 4991928173. The reversal of 4991928155 is 5518291994.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5518291994 = 2 ⋅2759145997.

It is not a de Polignac number, because 4991928155 - 2¹² = 4991924059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4991928097 and 4991928106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499192811 + ... + 499192820.

It is an arithmetic number, because the mean of its divisors is an integer number (1497578448).

Almost surely, 2^4991928155 is an apocalyptic number.

4991928155 is a deficient number, since it is larger than the sum of its proper divisors (998385637).

4991928155 is an equidigital number, since it uses as much as digits as its factorization.

4991928155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998385636.

The product of its digits is 1166400, while the sum is 53.

The square root of 4991928155 is about 70653.5785010214. The cubic root of 4991928155 is about 1709.0552736771.

The spelling of 4991928155 in words is "four billion, nine hundred ninety-one million, nine hundred twenty-eight thousand, one hundred fifty-five".