16720516458 has 24 divisors (see below), whose sum is σ = 38134512000. Its totient is φ = 5280162984.

The previous prime is 16720516429. The next prime is 16720516459. The reversal of 16720516458 is 85461502761.

16720516458 is a `hidden beast` number, since 1 + 67 + 20 + 516 + 4 + 58 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16720516459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24444858 + ... + 24445541.

It is an arithmetic number, because the mean of its divisors is an integer number (1588938000).

Almost surely, 2^16720516458 is an apocalyptic number.

16720516458 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16720516458 is an abundant number, since it is smaller than the sum of its proper divisors (21413995542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16720516458 is a wasteful number, since it uses less digits than its factorization.

16720516458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48890426 (or 48890423 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 16720516458 in words is "sixteen billion, seven hundred twenty million, five hundred sixteen thousand, four hundred fifty-eight".