16620103345541 has 4 divisors (see below), whose sum is σ = 17597756483532. Its totient is φ = 15642450207552.

The previous prime is 16620103345399. The next prime is 16620103345567. The reversal of 16620103345541 is 14554330102661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14124480645025 + 2495622700516 = 3758255^2 + 1579754^2 .

It is not a de Polignac number, because 16620103345541 - 2²² = 16620099151237 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 (16620103345591) 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, 488826568970 + ... + 488826569003.

It is an arithmetic number, because the mean of its divisors is an integer number (4399439120883).

Almost surely, 2^{16620103345541} is an apocalyptic number.

It is an amenable number.

16620103345541 is a deficient number, since it is larger than the sum of its proper divisors (977653137991).

16620103345541 is an equidigital number, since it uses as much as digits as its factorization.

16620103345541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977653137990.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 16620103345541 in words is "sixteen trillion, six hundred twenty billion, one hundred three million, three hundred forty-five thousand, five hundred forty-one".