61604465 has 32 divisors (see below), whose sum is σ = 84188160. Its totient is φ = 42932736.

The previous prime is 61604407. The next prime is 61604467. The reversal of 61604465 is 56440616.

It is a cyclic number.

It is not a de Polignac number, because 61604465 - 2¹⁰ = 61603441 is a prime.

It is a super-2 number, since 2×61604465² = 7590220215872450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61604467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132824 + ... + 133286.

It is an arithmetic number, because the mean of its divisors is an integer number (2630880).

Almost surely, 2^61604465 is an apocalyptic number.

61604465 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61604465 is a deficient number, since it is larger than the sum of its proper divisors (22583695).

61604465 is a wasteful number, since it uses less digits than its factorization.

61604465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 61604465 is about 7848.8511898239. The cubic root of 61604465 is about 394.9457063655.

The spelling of 61604465 in words is "sixty-one million, six hundred four thousand, four hundred sixty-five".