1601725578 has 16 divisors (see below), whose sum is σ = 3205028736. Its totient is φ = 533645600.

The previous prime is 1601725537. The next prime is 1601725591. The reversal of 1601725578 is 8755271061.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52323 + ... + 77078.

It is an arithmetic number, because the mean of its divisors is an integer number (200314296).

Almost surely, 2^1601725578 is an apocalyptic number.

1601725578 is an abundant number, since it is smaller than the sum of its proper divisors (1603303158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601725578 is a wasteful number, since it uses less digits than its factorization.

1601725578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131469.

The product of its (nonzero) digits is 117600, while the sum is 42.

The square root of 1601725578 is about 40021.5639124710. The cubic root of 1601725578 is about 1170.0274126092.

The spelling of 1601725578 in words is "one billion, six hundred one million, seven hundred twenty-five thousand, five hundred seventy-eight".