65610216145 has 8 divisors (see below), whose sum is σ = 80860158504. Its totient is φ = 51069573504.

The previous prime is 65610216131. The next prime is 65610216227. The reversal of 65610216145 is 54161201656.

It can be written as a sum of positive squares in 4 ways, for example, as 4185054864 + 61425161281 = 64692^2 + 247841^2 .

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 65610216145 - 2⁷ = 65610216017 is a prime.

It is a super-2 number, since 2×65610216145² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177324724 + ... + 177325093.

It is an arithmetic number, because the mean of its divisors is an integer number (10107519813).

Almost surely, 2^65610216145 is an apocalyptic number.

It is an amenable number.

65610216145 is a deficient number, since it is larger than the sum of its proper divisors (15249942359).

65610216145 is a wasteful number, since it uses less digits than its factorization.

65610216145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354649859.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 65610216145 in words is "sixty-five billion, six hundred ten million, two hundred sixteen thousand, one hundred forty-five".