65530638780 has 48 divisors (see below), whose sum is σ = 183498887040. Its totient is φ = 17473589568.

The previous prime is 65530638779. The next prime is 65530638793. The reversal of 65530638780 is 8783603556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1068591 + ... + 1128249.

It is an arithmetic number, because the mean of its divisors is an integer number (3822893480).

Almost surely, 2^65530638780 is an apocalyptic number.

65530638780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65530638780 is an abundant number, since it is smaller than the sum of its proper divisors (117968248260).

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

65530638780 is a wasteful number, since it uses less digits than its factorization.

65530638780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77978 (or 77976 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 65530638780 in words is "sixty-five billion, five hundred thirty million, six hundred thirty-eight thousand, seven hundred eighty".