4191263778 has 32 divisors (see below), whose sum is σ = 9060694272. Its totient is φ = 1284854400.

The previous prime is 4191263777. The next prime is 4191263801. The reversal of 4191263778 is 8773621914.

It is a happy number.

4191263778 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (4191263777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78003 + ... + 120278.

It is an arithmetic number, because the mean of its divisors is an integer number (283146696).

Almost surely, 2^4191263778 is an apocalyptic number.

4191263778 is an abundant number, since it is smaller than the sum of its proper divisors (4869430494).

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

4191263778 is a wasteful number, since it uses less digits than its factorization.

4191263778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198570.

The product of its digits is 508032, while the sum is 48.

The square root of 4191263778 is about 64739.9704819210. The cubic root of 4191263778 is about 1612.3091972062.

The spelling of 4191263778 in words is "four billion, one hundred ninety-one million, two hundred sixty-three thousand, seven hundred seventy-eight".