2779198145 has 16 divisors (see below), whose sum is σ = 3453734592. Its totient is φ = 2145474240.

The previous prime is 2779198133. The next prime is 2779198157. The reversal of 2779198145 is 5418919772.

It is an interprime number because it is at equal distance from previous prime (2779198133) and next prime (2779198157).

It is not a de Polignac number, because 2779198145 - 2⁴ = 2779198129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60026 + ... + 95715.

It is an arithmetic number, because the mean of its divisors is an integer number (215858412).

Almost surely, 2^2779198145 is an apocalyptic number.

It is an amenable number.

2779198145 is a deficient number, since it is larger than the sum of its proper divisors (674536447).

2779198145 is a wasteful number, since it uses less digits than its factorization.

2779198145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155872.

The product of its digits is 1270080, while the sum is 53.

The square root of 2779198145 is about 52718.1007339984. The cubic root of 2779198145 is about 1405.9606648324.

The spelling of 2779198145 in words is "two billion, seven hundred seventy-nine million, one hundred ninety-eight thousand, one hundred forty-five".