61618089 has 8 divisors (see below), whose sum is σ = 88477312. Its totient is φ = 37918800.

The previous prime is 61618087. The next prime is 61618093. The reversal of 61618089 is 98081616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61618089 - 2¹ = 61618087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1579951 = 61618089 / (6 + 1 + 6 + 1 + 8 + 0 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61618087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789937 + ... + 790014.

It is an arithmetic number, because the mean of its divisors is an integer number (11059664).

Almost surely, 2^61618089 is an apocalyptic number.

It is an amenable number.

61618089 is a deficient number, since it is larger than the sum of its proper divisors (26859223).

61618089 is a wasteful number, since it uses less digits than its factorization.

61618089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579967.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 61618089 is about 7849.7190395580. The cubic root of 61618089 is about 394.9748186692.

The spelling of 61618089 in words is "sixty-one million, six hundred eighteen thousand, eighty-nine".