4001557163 has 4 divisors (see below), whose sum is σ = 4018300320. Its totient is φ = 3984814008.

The previous prime is 4001557129. The next prime is 4001557169. The reversal of 4001557163 is 3617551004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4001557163 - 2⁶ = 4001557099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001557169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8371220 + ... + 8371697.

It is an arithmetic number, because the mean of its divisors is an integer number (1004575080).

Almost surely, 2^4001557163 is an apocalyptic number.

4001557163 is a deficient number, since it is larger than the sum of its proper divisors (16743157).

4001557163 is a wasteful number, since it uses less digits than its factorization.

4001557163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16743156.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 4001557163 is about 63257.8624599346. The cubic root of 4001557163 is about 1587.6070120931.

The spelling of 4001557163 in words is "four billion, one million, five hundred fifty-seven thousand, one hundred sixty-three".