16620433061 has 24 divisors (see below), whose sum is σ = 17829233760. Its totient is φ = 15489729792.

The previous prime is 16620433021. The next prime is 16620433111. The reversal of 16620433061 is 16033402661.

It is a de Polignac number, because none of the positive numbers 2^k-16620433061 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 (16620433001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18324170 + ... + 18325076.

It is an arithmetic number, because the mean of its divisors is an integer number (742884740).

Almost surely, 2^16620433061 is an apocalyptic number.

It is an amenable number.

16620433061 is a deficient number, since it is larger than the sum of its proper divisors (1208800699).

16620433061 is a wasteful number, since it uses less digits than its factorization.

16620433061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1476 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 16620433061 in words is "sixteen billion, six hundred twenty million, four hundred thirty-three thousand, sixty-one".