21715560766103 has 8 divisors (see below), whose sum is σ = 21725035973760. Its totient is φ = 21706086644280.

The previous prime is 21715560766057. The next prime is 21715560766117. The reversal of 21715560766103 is 30166706551712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21715560766103 - 2²⁸ = 21715292330647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21715560766303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41104676 + ... + 41629622.

It is an arithmetic number, because the mean of its divisors is an integer number (2715629496720).

Almost surely, 2^{21715560766103} is an apocalyptic number.

21715560766103 is a deficient number, since it is larger than the sum of its proper divisors (9475207657).

21715560766103 is a wasteful number, since it uses less digits than its factorization.

21715560766103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542917.

The product of its (nonzero) digits is 1587600, while the sum is 50.

The spelling of 21715560766103 in words is "twenty-one trillion, seven hundred fifteen billion, five hundred sixty million, seven hundred sixty-six thousand, one hundred three".