65561594 has 16 divisors (see below), whose sum is σ = 112505856. Its totient is φ = 28069200.

The previous prime is 65561593. The next prime is 65561597. The reversal of 65561594 is 49516556.

It is not an unprimeable number, because it can be changed into a prime (65561593) 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, 17639 + ... + 21029.

It is an arithmetic number, because the mean of its divisors is an integer number (7031616).

Almost surely, 2^65561594 is an apocalyptic number.

65561594 is a deficient number, since it is larger than the sum of its proper divisors (46944262).

65561594 is a wasteful number, since it uses less digits than its factorization.

65561594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4781.

The product of its digits is 162000, while the sum is 41.

The square root of 65561594 is about 8097.0114239761. The cubic root of 65561594 is about 403.2272135420.

The spelling of 65561594 in words is "sixty-five million, five hundred sixty-one thousand, five hundred ninety-four".