1601661035 has 32 divisors (see below), whose sum is σ = 2262339072. Its totient is φ = 1077258240.

The previous prime is 1601660987. The next prime is 1601661041. The reversal of 1601661035 is 5301661061.

It is not a de Polignac number, because 1601661035 - 2³⁰ = 527919211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1601660989 and 1601661007.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10877 + ... + 57633.

It is an arithmetic number, because the mean of its divisors is an integer number (70698096).

Almost surely, 2^1601661035 is an apocalyptic number.

1601661035 is a deficient number, since it is larger than the sum of its proper divisors (660678037).

1601661035 is a wasteful number, since it uses less digits than its factorization.

1601661035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46823.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1601661035 is about 40020.7575515507. The cubic root of 1601661035 is about 1170.0116966225.

The spelling of 1601661035 in words is "one billion, six hundred one million, six hundred sixty-one thousand, thirty-five".