65616261656 has 32 divisors (see below), whose sum is σ = 134565580800. Its totient is φ = 29747684640.

The previous prime is 65616261653. The next prime is 65616261661.

65616261656 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65616261653) 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, 939716 + ... + 1007123.

It is an arithmetic number, because the mean of its divisors is an integer number (4205174400).

Almost surely, 2^65616261656 is an apocalyptic number.

It is an amenable number.

65616261656 is an abundant number, since it is smaller than the sum of its proper divisors (68949319144).

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

65616261656 is a wasteful number, since it uses less digits than its factorization.

65616261656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947239 (or 1947235 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 50.

The spelling of 65616261656 in words is "sixty-five billion, six hundred sixteen million, two hundred sixty-one thousand, six hundred fifty-six".