61800027 has 16 divisors (see below), whose sum is σ = 89084160. Its totient is φ = 37975392.

The previous prime is 61800023. The next prime is 61800031. The reversal of 61800027 is 72000816.

It is an interprime number because it is at equal distance from previous prime (61800023) and next prime (61800031).

It is not a de Polignac number, because 61800027 - 2² = 61800023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61800023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12543 + ... + 16760.

It is an arithmetic number, because the mean of its divisors is an integer number (5567760).

Almost surely, 2^61800027 is an apocalyptic number.

61800027 is a deficient number, since it is larger than the sum of its proper divisors (27284133).

61800027 is a wasteful number, since it uses less digits than its factorization.

61800027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29362.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 61800027 is about 7861.2993200870. The cubic root of 61800027 is about 395.3631803677.

The spelling of 61800027 in words is "sixty-one million, eight hundred thousand, twenty-seven".