61716155 has 4 divisors (see below), whose sum is σ = 74059392. Its totient is φ = 49372920.

The previous prime is 61716077. The next prime is 61716167. The reversal of 61716155 is 55161716.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61716155 - 2²² = 57521851 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6171611 + ... + 6171620.

It is an arithmetic number, because the mean of its divisors is an integer number (18514848).

Almost surely, 2^61716155 is an apocalyptic number.

61716155 is a deficient number, since it is larger than the sum of its proper divisors (12343237).

61716155 is a wasteful number, since it uses less digits than its factorization.

61716155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12343236.

The product of its digits is 6300, while the sum is 32.

The square root of 61716155 is about 7855.9630218071. The cubic root of 61716155 is about 395.1842434826.

The spelling of 61716155 in words is "sixty-one million, seven hundred sixteen thousand, one hundred fifty-five".