3801778491 has 32 divisors (see below), whose sum is σ = 6085214208. Its totient is φ = 2064189600.

The previous prime is 3801778433. The next prime is 3801778499. The reversal of 3801778491 is 1948771083.

3801778491 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3801778491 - 2⁶ = 3801778427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3801778491.

It is not an unprimeable number, because it can be changed into a prime (3801778499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46870 + ... + 98996.

It is an arithmetic number, because the mean of its divisors is an integer number (190162944).

Almost surely, 2^3801778491 is an apocalyptic number.

3801778491 is a deficient number, since it is larger than the sum of its proper divisors (2283435717).

3801778491 is a wasteful number, since it uses less digits than its factorization.

3801778491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52311.

The product of its (nonzero) digits is 338688, while the sum is 48.

The square root of 3801778491 is about 61658.5638090931. The cubic root of 3801778491 is about 1560.7341617514.

The spelling of 3801778491 in words is "three billion, eight hundred one million, seven hundred seventy-eight thousand, four hundred ninety-one".