65515680555 has 32 divisors (see below), whose sum is σ = 112904742720. Its totient is φ = 32249249280.

The previous prime is 65515680521. The next prime is 65515680557. The reversal of 65515680555 is 55508651556.

65515680555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65515680555 - 2⁷ = 65515680427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65515680498 and 65515680507.

It is not an unprimeable number, because it can be changed into a prime (65515680557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1630041 + ... + 1669749.

It is an arithmetic number, because the mean of its divisors is an integer number (3528273210).

Almost surely, 2^65515680555 is an apocalyptic number.

65515680555 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

65515680555 is a deficient number, since it is larger than the sum of its proper divisors (47389062165).

65515680555 is a wasteful number, since it uses less digits than its factorization.

65515680555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48191.

The product of its (nonzero) digits is 4500000, while the sum is 51.

The spelling of 65515680555 in words is "sixty-five billion, five hundred fifteen million, six hundred eighty thousand, five hundred fifty-five".