1536561601 has 3 divisors (see below), whose sum is σ = 1536600801. Its totient is φ = 1536522402.

The previous prime is 1536561583. The next prime is 1536561617. The reversal of 1536561601 is 1061656351.

The square root of 1536561601 is 39199.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1536561601 - 2⁵ = 1536561569 is a prime.

It is a super-2 number, since 2×1536561601² = 4722043107335366402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1536561101) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 19600 + ... + 58798.

It is an arithmetic number, because the mean of its divisors is an integer number (512200267).

Almost surely, 2^1536561601 is an apocalyptic number.

1536561601 is the 39199-th square number.

1536561601 is the 19600-th centered octagonal number.

It is an amenable number.

1536561601 is a deficient number, since it is larger than the sum of its proper divisors (39200).

1536561601 is an frugal number, since it uses more digits than its factorization.

1536561601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78398 (or 39199 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The cubic root of 1536561601 is about 1153.9402586949.

The spelling of 1536561601 in words is "one billion, five hundred thirty-six million, five hundred sixty-one thousand, six hundred one".