1601660115 has 32 divisors (see below), whose sum is σ = 3106252800. Its totient is φ = 776561760.

The previous prime is 1601660113. The next prime is 1601660129. The reversal of 1601660115 is 5110661061.

It is not a de Polignac number, because 1601660115 - 2¹ = 1601660113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1601660113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 537795 + ... + 540764.

It is an arithmetic number, because the mean of its divisors is an integer number (97070400).

Almost surely, 2^1601660115 is an apocalyptic number.

1601660115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1601660115 is a deficient number, since it is larger than the sum of its proper divisors (1504592685).

1601660115 is a wasteful number, since it uses less digits than its factorization.

1601660115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078584 (or 1078578 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1601660115 is about 40020.7460575137. The cubic root of 1601660115 is about 1170.0114726028.

The spelling of 1601660115 in words is "one billion, six hundred one million, six hundred sixty thousand, one hundred fifteen".