2144779698 has 48 divisors (see below), whose sum is σ = 4536923616. Its totient is φ = 675846720.

The previous prime is 2144779657. The next prime is 2144779711. The reversal of 2144779698 is 8969774412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1495990 + ... + 1497422.

It is an arithmetic number, because the mean of its divisors is an integer number (94519242).

Almost surely, 2^2144779698 is an apocalyptic number.

2144779698 is an abundant number, since it is smaller than the sum of its proper divisors (2392143918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2144779698 is a wasteful number, since it uses less digits than its factorization.

2144779698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167 (or 2148 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 57.

The square root of 2144779698 is about 46311.7663018806. The cubic root of 2144779698 is about 1289.6174371862.

The spelling of 2144779698 in words is "two billion, one hundred forty-four million, seven hundred seventy-nine thousand, six hundred ninety-eight".