101256321603665 has 16 divisors (see below), whose sum is σ = 122484608698368. Its totient is φ = 80353919915136.

The previous prime is 101256321603649. The next prime is 101256321603673. The reversal of 101256321603665 is 566306123652101.

It is a cyclic number.

It is not a de Polignac number, because 101256321603665 - 2⁴ = 101256321603649 is a prime.

It is a Duffinian 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, 9356372 + ... + 17030981.

It is an arithmetic number, because the mean of its divisors is an integer number (7655288043648).

Almost surely, 2^{101256321603665} is an apocalyptic number.

It is an amenable number.

101256321603665 is a deficient number, since it is larger than the sum of its proper divisors (21228287094703).

101256321603665 is a wasteful number, since it uses less digits than its factorization.

101256321603665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26393528.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 101256321603665 in words is "one hundred one trillion, two hundred fifty-six billion, three hundred twenty-one million, six hundred three thousand, six hundred sixty-five".