76616215202561 has 4 divisors (see below), whose sum is σ = 76616562010800. Its totient is φ = 76615868394324.

The previous prime is 76616215202543. The next prime is 76616215202563. The reversal of 76616215202561 is 16520251261667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 76616215202561 - 2¹⁴ = 76616215186177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76616215202563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173072531 + ... + 173514648.

It is an arithmetic number, because the mean of its divisors is an integer number (19154140502700).

Almost surely, 2^{76616215202561} is an apocalyptic number.

It is an amenable number.

76616215202561 is a deficient number, since it is larger than the sum of its proper divisors (346808239).

76616215202561 is a wasteful number, since it uses less digits than its factorization.

76616215202561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346808238.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 76616215202561 in words is "seventy-six trillion, six hundred sixteen billion, two hundred fifteen million, two hundred two thousand, five hundred sixty-one".