61645345 has 16 divisors (see below), whose sum is σ = 76712832. Its totient is φ = 47520640.

The previous prime is 61645333. The next prime is 61645351. The reversal of 61645345 is 54354616.

It is not a de Polignac number, because 61645345 - 2⁷ = 61645217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61645345.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15204 + ... + 18826.

It is an arithmetic number, because the mean of its divisors is an integer number (4794552).

Almost surely, 2^61645345 is an apocalyptic number.

It is an amenable number.

61645345 is a deficient number, since it is larger than the sum of its proper divisors (15067487).

61645345 is a wasteful number, since it uses less digits than its factorization.

61645345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3752.

The product of its digits is 43200, while the sum is 34.

The square root of 61645345 is about 7851.4549607063. The cubic root of 61645345 is about 395.0330474941.

The spelling of 61645345 in words is "sixty-one million, six hundred forty-five thousand, three hundred forty-five".