16720650401 has 8 divisors (see below), whose sum is σ = 20579262144. Its totient is φ = 13229525520.

The previous prime is 16720650371. The next prime is 16720650409. The reversal of 16720650401 is 10405602761.

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 16720650401 - 2⁶ = 16720650337 is a prime.

It is a super-2 number, since 2×16720650401² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16720650409) 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, 91871615 + ... + 91871796.

It is an arithmetic number, because the mean of its divisors is an integer number (2572407768).

Almost surely, 2^16720650401 is an apocalyptic number.

It is an amenable number.

16720650401 is a deficient number, since it is larger than the sum of its proper divisors (3858611743).

16720650401 is a wasteful number, since it uses less digits than its factorization.

16720650401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183743431.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 16720650401 in words is "sixteen billion, seven hundred twenty million, six hundred fifty thousand, four hundred one".