65611161560 has 64 divisors (see below), whose sum is σ = 168853248000. Its totient is φ = 22476744576.

The previous prime is 65611161559. The next prime is 65611161599. The reversal of 65611161560 is 6516111656.

It is a super-3 number, since 3×65611161560³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246641 + ... + 438239.

It is an arithmetic number, because the mean of its divisors is an integer number (2638332000).

Almost surely, 2^65611161560 is an apocalyptic number.

It is an amenable number.

65611161560 is an abundant number, since it is smaller than the sum of its proper divisors (103242086440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65611161560 is a wasteful number, since it uses less digits than its factorization.

65611161560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192840 (or 192836 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 65611161560 in words is "sixty-five billion, six hundred eleven million, one hundred sixty-one thousand, five hundred sixty".