4105849978 has 4 divisors (see below), whose sum is σ = 6158774970. Its totient is φ = 2052924988.

The previous prime is 4105849961. The next prime is 4105849999. The reversal of 4105849978 is 8799485014.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3139697089 + 966152889 = 56033^2 + 31083^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026462493 + ... + 1026462496.

Almost surely, 2^4105849978 is an apocalyptic number.

4105849978 is a deficient number, since it is larger than the sum of its proper divisors (2052924992).

4105849978 is a wasteful number, since it uses less digits than its factorization.

4105849978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052924991.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The square root of 4105849978 is about 64076.9067449421. The cubic root of 4105849978 is about 1601.2815225072.

The spelling of 4105849978 in words is "four billion, one hundred five million, eight hundred forty-nine thousand, nine hundred seventy-eight".