1601615147 has 4 divisors (see below), whose sum is σ = 1747216536. Its totient is φ = 1456013760.

The previous prime is 1601615131. The next prime is 1601615159. The reversal of 1601615147 is 7415161061.

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 1601615147 - 2⁴ = 1601615131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601615107) 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, 72800678 + ... + 72800699.

It is an arithmetic number, because the mean of its divisors is an integer number (436804134).

Almost surely, 2^1601615147 is an apocalyptic number.

1601615147 is a deficient number, since it is larger than the sum of its proper divisors (145601389).

1601615147 is a wasteful number, since it uses less digits than its factorization.

1601615147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145601388.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1601615147 is about 40020.1842449532. The cubic root of 1601615147 is about 1170.0005228040. Note that the first 3 decimals are identical.

The spelling of 1601615147 in words is "one billion, six hundred one million, six hundred fifteen thousand, one hundred forty-seven".