73857561 has 8 divisors (see below), whose sum is σ = 98529504. Its totient is φ = 49212000.

The previous prime is 73857551. The next prime is 73857601. The reversal of 73857561 is 16575837.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73857561 - 2⁵ = 73857529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73857521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1285 + ... + 12221.

It is an arithmetic number, because the mean of its divisors is an integer number (12316188).

Almost surely, 2^73857561 is an apocalyptic number.

It is an amenable number.

73857561 is a deficient number, since it is larger than the sum of its proper divisors (24671943).

73857561 is a wasteful number, since it uses less digits than its factorization.

73857561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13191.

The product of its digits is 176400, while the sum is 42.

The square root of 73857561 is about 8594.0421804876. The cubic root of 73857561 is about 419.5640999086.

The spelling of 73857561 in words is "seventy-three million, eight hundred fifty-seven thousand, five hundred sixty-one".