16720602761 has 16 divisors (see below), whose sum is σ = 17777707200. Its totient is φ = 15698856768.

The previous prime is 16720602733. The next prime is 16720602779.

16720602761 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 16720602761 - 2¹⁸ = 16720340617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16720602061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253535 + ... + 312603.

It is an arithmetic number, because the mean of its divisors is an integer number (1111106700).

Almost surely, 2^16720602761 is an apocalyptic number.

It is an amenable number.

16720602761 is a deficient number, since it is larger than the sum of its proper divisors (1057104439).

16720602761 is a wasteful number, since it uses less digits than its factorization.

16720602761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59368.

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 16720602761 in words is "sixteen billion, seven hundred twenty million, six hundred two thousand, seven hundred sixty-one".