10211610661565 has 16 divisors (see below), whose sum is σ = 12303115344576. Its totient is φ = 8136502080000.

The previous prime is 10211610661541. The next prime is 10211610661597. The reversal of 10211610661565 is 56516601611201.

It is a happy number.

10211610661565 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 10211610661565 - 2²⁰ = 10211609612989 is a prime.

It is a Duffinian number.

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, 51346970 + ... + 51545460.

It is an arithmetic number, because the mean of its divisors is an integer number (768944709036).

Almost surely, 2^{10211610661565} is an apocalyptic number.

It is an amenable number.

10211610661565 is a deficient number, since it is larger than the sum of its proper divisors (2091504683011).

10211610661565 is a wasteful number, since it uses less digits than its factorization.

10211610661565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239740.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 10211610661565 in words is "ten trillion, two hundred eleven billion, six hundred ten million, six hundred sixty-one thousand, five hundred sixty-five".