3815147144 has 8 divisors (see below), whose sum is σ = 7153400910. Its totient is φ = 1907573568.

The previous prime is 3815147143. The next prime is 3815147197. The reversal of 3815147144 is 4417415183.

It can be written as a sum of positive squares in only one way, i.e., 3121456900 + 693690244 = 55870^2 + 26338^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 3815147098 and 3815147107.

It is not an unprimeable number, because it can be changed into a prime (3815147143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238446689 + ... + 238446704.

Almost surely, 2^3815147144 is an apocalyptic number.

It is an amenable number.

3815147144 is a deficient number, since it is larger than the sum of its proper divisors (3338253766).

3815147144 is a wasteful number, since it uses less digits than its factorization.

3815147144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476893399 (or 476893395 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 3815147144 is about 61766.8774020510. The cubic root of 3815147144 is about 1562.5614209797.

The spelling of 3815147144 in words is "three billion, eight hundred fifteen million, one hundred forty-seven thousand, one hundred forty-four".