19801609147516 has 24 divisors (see below), whose sum is σ = 39603974453120. Its totient is φ = 8486241886512.

The previous prime is 19801609147501. The next prime is 19801609147591. The reversal of 19801609147516 is 61574190610891.

It is a happy number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 5252910 + ... + 8197333.

Almost surely, 2^{19801609147516} is an apocalyptic number.

It is an amenable number.

19801609147516 is an abundant number, since it is smaller than the sum of its proper divisors (19802365305604).

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

19801609147516 is a wasteful number, since it uses less digits than its factorization.

19801609147516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13502833 (or 13502831 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 58.

The spelling of 19801609147516 in words is "nineteen trillion, eight hundred one billion, six hundred nine million, one hundred forty-seven thousand, five hundred sixteen".