61440645 has 16 divisors (see below), whose sum is σ = 112348800. Its totient is φ = 28087104.

The previous prime is 61440637. The next prime is 61440671. The reversal of 61440645 is 54604416.

It is not a de Polignac number, because 61440645 - 2³ = 61440637 is a prime.

It is a congruent number.

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, 292470 + ... + 292679.

It is an arithmetic number, because the mean of its divisors is an integer number (7021800).

Almost surely, 2^61440645 is an apocalyptic number.

It is an amenable number.

61440645 is a deficient number, since it is larger than the sum of its proper divisors (50908155).

61440645 is a wasteful number, since it uses less digits than its factorization.

61440645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585164.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 61440645 is about 7838.4083205712. The cubic root of 61440645 is about 394.5953127099.

The spelling of 61440645 in words is "sixty-one million, four hundred forty thousand, six hundred forty-five".