61098111 has 16 divisors (see below), whose sum is σ = 90849120. Its totient is φ = 40582080.

The previous prime is 61098109. The next prime is 61098113. The reversal of 61098111 is 11189016.

It is an interprime number because it is at equal distance from previous prime (61098109) and next prime (61098113).

It is not a de Polignac number, because 61098111 - 2¹ = 61098109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61098113) 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, 3561 + ... + 11613.

It is an arithmetic number, because the mean of its divisors is an integer number (5678070).

Almost surely, 2^61098111 is an apocalyptic number.

61098111 is a deficient number, since it is larger than the sum of its proper divisors (29751009).

61098111 is a wasteful number, since it uses less digits than its factorization.

61098111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8343 (or 8337 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 61098111 is about 7816.5280655800. The cubic root of 61098111 is about 393.8606509883.

The spelling of 61098111 in words is "sixty-one million, ninety-eight thousand, one hundred eleven".