1615061601 has 12 divisors (see below), whose sum is σ = 2334461220. Its totient is φ = 1075971840.

The previous prime is 1615061597. The next prime is 1615061603. The reversal of 1615061601 is 1061605161.

1615061601 is a `hidden beast` number, since 1 + 6 + 1 + 50 + 6 + 1 + 601 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 730296576 + 884765025 = 27024^2 + 29745^2 .

It is not a de Polignac number, because 1615061601 - 2² = 1615061597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1615061603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47256 + ... + 73913.

It is an arithmetic number, because the mean of its divisors is an integer number (194538435).

Almost surely, 2^1615061601 is an apocalyptic number.

It is an amenable number.

1615061601 is a deficient number, since it is larger than the sum of its proper divisors (719399619).

1615061601 is a wasteful number, since it uses less digits than its factorization.

1615061601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122656 (or 122653 counting only the distinct ones).

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

The square root of 1615061601 is about 40187.8290157605. The cubic root of 1615061601 is about 1173.2656715585.

Adding to 1615061601 its reverse (1061605161), we get a palindrome (2676666762).

The spelling of 1615061601 in words is "one billion, six hundred fifteen million, sixty-one thousand, six hundred one".