101563665451 has 4 divisors (see below), whose sum is σ = 101566326600. Its totient is φ = 101561004304.

The previous prime is 101563665449. The next prime is 101563665499. The reversal of 101563665451 is 154566365101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 101563665451 - 2¹ = 101563665449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101563665398 and 101563665407.

It is not an unprimeable number, because it can be changed into a prime (101563665851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272481 + ... + 1349938.

It is an arithmetic number, because the mean of its divisors is an integer number (25391581650).

Almost surely, 2^101563665451 is an apocalyptic number.

101563665451 is a deficient number, since it is larger than the sum of its proper divisors (2661149).

101563665451 is an equidigital number, since it uses as much as digits as its factorization.

101563665451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661148.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 101563665451 in words is "one hundred one billion, five hundred sixty-three million, six hundred sixty-five thousand, four hundred fifty-one".