3978541777 has 8 divisors (see below), whose sum is σ = 4547297216. Its totient is φ = 3409884432.

The previous prime is 3978541759. The next prime is 3978541789. The reversal of 3978541777 is 7771458793.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3978541777 - 2¹⁹ = 3978017489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3978541577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116383 + ... + 146635.

It is an arithmetic number, because the mean of its divisors is an integer number (568412152).

Almost surely, 2^3978541777 is an apocalyptic number.

It is an amenable number.

3978541777 is a deficient number, since it is larger than the sum of its proper divisors (568755439).

3978541777 is a wasteful number, since it uses less digits than its factorization.

3978541777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49047.

The product of its digits is 10372320, while the sum is 58.

The square root of 3978541777 is about 63075.6829293191. The cubic root of 3978541777 is about 1584.5573937553.

The spelling of 3978541777 in words is "three billion, nine hundred seventy-eight million, five hundred forty-one thousand, seven hundred seventy-seven".