61155216417 has 8 divisors (see below), whose sum is σ = 82135473696. Its totient is φ = 40472551712.

The previous prime is 61155216401. The next prime is 61155216431. The reversal of 61155216417 is 71461255116.

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

It is a cyclic number.

It is not a de Polignac number, because 61155216417 - 2⁴ = 61155216401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61155226417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74397663 + ... + 74398484.

It is an arithmetic number, because the mean of its divisors is an integer number (10266934212).

Almost surely, 2^61155216417 is an apocalyptic number.

It is an amenable number.

61155216417 is a deficient number, since it is larger than the sum of its proper divisors (20980257279).

61155216417 is a wasteful number, since it uses less digits than its factorization.

61155216417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148796287.

The product of its digits is 50400, while the sum is 39.

The spelling of 61155216417 in words is "sixty-one billion, one hundred fifty-five million, two hundred sixteen thousand, four hundred seventeen".