61151618 has 32 divisors (see below), whose sum is σ = 110574720. Its totient is φ = 25020160.

The previous prime is 61151617. The next prime is 61151621. The reversal of 61151618 is 81615116.

It is not an unprimeable number, because it can be changed into a prime (61151611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5048 + ... + 12156.

It is an arithmetic number, because the mean of its divisors is an integer number (3455460).

Almost surely, 2^61151618 is an apocalyptic number.

61151618 is a deficient number, since it is larger than the sum of its proper divisors (49423102).

61151618 is a wasteful number, since it uses less digits than its factorization.

61151618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7162.

The product of its digits is 1440, while the sum is 29.

The square root of 61151618 is about 7819.9499998402. The cubic root of 61151618 is about 393.9755926372.

The spelling of 61151618 in words is "sixty-one million, one hundred fifty-one thousand, six hundred eighteen".