16721525426 has 8 divisors (see below), whose sum is σ = 25891394304. Its totient is φ = 8091060660.

The previous prime is 16721525399. The next prime is 16721525449. The reversal of 16721525426 is 62452512761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134850950 + ... + 134851073.

It is an arithmetic number, because the mean of its divisors is an integer number (3236424288).

Almost surely, 2^16721525426 is an apocalyptic number.

16721525426 is a deficient number, since it is larger than the sum of its proper divisors (9169868878).

16721525426 is a wasteful number, since it uses less digits than its factorization.

16721525426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269702056.

The product of its digits is 201600, while the sum is 41.

The spelling of 16721525426 in words is "sixteen billion, seven hundred twenty-one million, five hundred twenty-five thousand, four hundred twenty-six".