61097918 has 16 divisors (see below), whose sum is σ = 105162624. Its totient is φ = 26079000.

The previous prime is 61097899. The next prime is 61097921. The reversal of 61097918 is 81979016.

It is a happy number.

It is a congruent number.

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, 5180 + ... + 12207.

It is an arithmetic number, because the mean of its divisors is an integer number (6572664).

Almost surely, 2^61097918 is an apocalyptic number.

61097918 is a deficient number, since it is larger than the sum of its proper divisors (44064706).

61097918 is a wasteful number, since it uses less digits than its factorization.

61097918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17647.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 61097918 is about 7816.5157199356. The cubic root of 61097918 is about 393.8602362718.

The spelling of 61097918 in words is "sixty-one million, ninety-seven thousand, nine hundred eighteen".