65514651561 has 12 divisors (see below), whose sum is σ = 100198879092. Its totient is φ = 41107232256.

The previous prime is 65514651523. The next prime is 65514651589. The reversal of 65514651561 is 16515641556.

65514651561 is a `hidden beast` number, since 6 + 5 + 514 + 65 + 15 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 46675442025 + 18839209536 = 216045^2 + 137256^2 .

It is not a de Polignac number, because 65514651561 - 2⁶ = 65514651497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65514652561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214100016 + ... + 214100321.

It is an arithmetic number, because the mean of its divisors is an integer number (8349906591).

Almost surely, 2^65514651561 is an apocalyptic number.

It is an amenable number.

65514651561 is a deficient number, since it is larger than the sum of its proper divisors (34684227531).

65514651561 is a wasteful number, since it uses less digits than its factorization.

65514651561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428200360 (or 428200357 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The spelling of 65514651561 in words is "sixty-five billion, five hundred fourteen million, six hundred fifty-one thousand, five hundred sixty-one".