61020645 has 16 divisors (see below), whose sum is σ = 111580800. Its totient is φ = 27895104.

The previous prime is 61020643. The next prime is 61020677. The reversal of 61020645 is 54602016.

It is not a de Polignac number, because 61020645 - 2¹ = 61020643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61020643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290470 + ... + 290679.

It is an arithmetic number, because the mean of its divisors is an integer number (6973800).

Almost surely, 2^61020645 is an apocalyptic number.

It is an amenable number.

61020645 is a deficient number, since it is larger than the sum of its proper divisors (50560155).

61020645 is a wasteful number, since it uses less digits than its factorization.

61020645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581164.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 61020645 is about 7811.5712247921. The cubic root of 61020645 is about 393.6941225822.

The spelling of 61020645 in words is "sixty-one million, twenty thousand, six hundred forty-five".