4078155825 has 36 divisors (see below), whose sum is σ = 7320461148. Its totient is φ = 2170243200.

The previous prime is 4078155821. The next prime is 4078155841. The reversal of 4078155825 is 5285518704.

4078155825 is a `hidden beast` number, since 4 + 0 + 78 + 1 + 558 + 25 = 666.

4078155825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 9884736 + 4068271089 = 3144^2 + 63783^2 .

It is not a de Polignac number, because 4078155825 - 2² = 4078155821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (4078155821) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 84067 + ... + 123383.

It is an arithmetic number, because the mean of its divisors is an integer number (203346143).

Almost surely, 2^4078155825 is an apocalyptic number.

4078155825 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4078155825 is a deficient number, since it is larger than the sum of its proper divisors (3242305323).

4078155825 is a wasteful number, since it uses less digits than its factorization.

4078155825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39794 (or 39786 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 45.

The square root of 4078155825 is about 63860.4402192782. The cubic root of 4078155825 is about 1597.6731574813.

The spelling of 4078155825 in words is "four billion, seventy-eight million, one hundred fifty-five thousand, eight hundred twenty-five".