2078249155 has 4 divisors (see below), whose sum is σ = 2493898992. Its totient is φ = 1662599320.

The previous prime is 2078249143. The next prime is 2078249161. The reversal of 2078249155 is 5519428702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5519428702 = 2 ⋅2759714351.

It is not a de Polignac number, because 2078249155 - 2⁷ = 2078249027 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207824911 + ... + 207824920.

It is an arithmetic number, because the mean of its divisors is an integer number (623474748).

Almost surely, 2^2078249155 is an apocalyptic number.

2078249155 is a deficient number, since it is larger than the sum of its proper divisors (415649837).

2078249155 is an equidigital number, since it uses as much as digits as its factorization.

2078249155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415649836.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 2078249155 is about 45587.8180548269. The cubic root of 2078249155 is about 1276.1425933402.

The spelling of 2078249155 in words is "two billion, seventy-eight million, two hundred forty-nine thousand, one hundred fifty-five".