61642045 has 16 divisors (see below), whose sum is σ = 75322800. Its totient is φ = 48420864.

The previous prime is 61642039. The next prime is 61642069. The reversal of 61642045 is 54024616.

It can be written as a sum of positive squares in 8 ways, for example, as 18844281 + 42797764 = 4341^2 + 6542^2 .

It is a cyclic number.

It is not a de Polignac number, because 61642045 - 2⁵ = 61642013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71839 + ... + 72691.

It is an arithmetic number, because the mean of its divisors is an integer number (4707675).

Almost surely, 2^61642045 is an apocalyptic number.

It is an amenable number.

61642045 is a deficient number, since it is larger than the sum of its proper divisors (13680755).

61642045 is a wasteful number, since it uses less digits than its factorization.

61642045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 61642045 is about 7851.2448057617. The cubic root of 61642045 is about 395.0259983956.

The spelling of 61642045 in words is "sixty-one million, six hundred forty-two thousand, forty-five".