65611200040 has 32 divisors (see below), whose sum is σ = 147775466880. Its totient is φ = 26217765952.

The previous prime is 65611200037. The next prime is 65611200041. The reversal of 65611200040 is 4000211656.

It is a junction number, because it is equal to n+sod(n) for n = 65611199978 and 65611200014.

It is not an unprimeable number, because it can be changed into a prime (65611200041) 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, 795004 + ... + 873643.

It is an arithmetic number, because the mean of its divisors is an integer number (4617983340).

Almost surely, 2^65611200040 is an apocalyptic number.

It is an amenable number.

65611200040 is an abundant number, since it is smaller than the sum of its proper divisors (82164266840).

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

65611200040 is a wasteful number, since it uses less digits than its factorization.

65611200040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669641 (or 1669637 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 65611200040 its reverse (4000211656), we get a palindrome (69611411696).

The spelling of 65611200040 in words is "sixty-five billion, six hundred eleven million, two hundred thousand, forty".