61982155 has 8 divisors (see below), whose sum is σ = 75639600. Its totient is φ = 48745056.

The previous prime is 61982149. The next prime is 61982203. The reversal of 61982155 is 55128916.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61982155 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104760 + ... + 105349.

It is an arithmetic number, because the mean of its divisors is an integer number (9454950).

Almost surely, 2^61982155 is an apocalyptic number.

61982155 is a deficient number, since it is larger than the sum of its proper divisors (13657445).

61982155 is a wasteful number, since it uses less digits than its factorization.

61982155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210173.

The product of its digits is 21600, while the sum is 37.

The square root of 61982155 is about 7872.8746338298. The cubic root of 61982155 is about 395.7511849718.

The spelling of 61982155 in words is "sixty-one million, nine hundred eighty-two thousand, one hundred fifty-five".