3841655978 has 4 divisors (see below), whose sum is σ = 5762483970. Its totient is φ = 1920827988.

The previous prime is 3841655977. The next prime is 3841656023. The reversal of 3841655978 is 8795561483.

3841655978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 3222492289 + 619163689 = 56767^2 + 24883^2 .

It is not an unprimeable number, because it can be changed into a prime (3841655977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960413993 + ... + 960413996.

Almost surely, 2^3841655978 is an apocalyptic number.

3841655978 is a deficient number, since it is larger than the sum of its proper divisors (1920827992).

3841655978 is a wasteful number, since it uses less digits than its factorization.

3841655978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920827991.

The product of its digits is 7257600, while the sum is 56.

The square root of 3841655978 is about 61981.0937141319. The cubic root of 3841655978 is about 1566.1721260162.

The spelling of 3841655978 in words is "three billion, eight hundred forty-one million, six hundred fifty-five thousand, nine hundred seventy-eight".