61718069 has 8 divisors (see below), whose sum is σ = 71501760. Its totient is φ = 52176096.

The previous prime is 61718057. The next prime is 61718077. The reversal of 61718069 is 96081716.

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

It is not a de Polignac number, because 61718069 - 2²⁰ = 60669493 is a prime.

It is a super-2 number, since 2×61718069² = 7618240082177522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61718009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59879 + ... + 60900.

It is an arithmetic number, because the mean of its divisors is an integer number (8937720).

Almost surely, 2^61718069 is an apocalyptic number.

It is an amenable number.

61718069 is a deficient number, since it is larger than the sum of its proper divisors (9783691).

61718069 is a wasteful number, since it uses less digits than its factorization.

61718069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120859.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 61718069 is about 7856.0848391549. The cubic root of 61718069 is about 395.1883287167.

The spelling of 61718069 in words is "sixty-one million, seven hundred eighteen thousand, sixty-nine".