73601561 has 4 divisors (see below), whose sum is σ = 80292624. Its totient is φ = 66910500.

The previous prime is 73601537. The next prime is 73601569. The reversal of 73601561 is 16510637.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73601561 - 2¹⁴ = 73585177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73601569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3345515 + ... + 3345536.

It is an arithmetic number, because the mean of its divisors is an integer number (20073156).

Almost surely, 2^73601561 is an apocalyptic number.

It is an amenable number.

73601561 is a deficient number, since it is larger than the sum of its proper divisors (6691063).

73601561 is a wasteful number, since it uses less digits than its factorization.

73601561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6691062.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 73601561 is about 8579.1352128289. The cubic root of 73601561 is about 419.0787840075.

The spelling of 73601561 in words is "seventy-three million, six hundred one thousand, five hundred sixty-one".