98721428465 has 32 divisors (see below), whose sum is σ = 130996224000. Its totient is φ = 70820867520.

The previous prime is 98721428461. The next prime is 98721428503. The reversal of 98721428465 is 56482412789.

It is not a de Polignac number, because 98721428465 - 2² = 98721428461 is a prime.

It is a super-3 number, since 3×98721428465³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 98721428465.

It is not an unprimeable number, because it can be changed into a prime (98721428461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4782236 + ... + 4802834.

It is an arithmetic number, because the mean of its divisors is an integer number (4093632000).

Almost surely, 2^98721428465 is an apocalyptic number.

It is an amenable number.

98721428465 is a deficient number, since it is larger than the sum of its proper divisors (32274795535).

98721428465 is a wasteful number, since it uses less digits than its factorization.

98721428465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21797.

The product of its digits is 7741440, while the sum is 56.

The spelling of 98721428465 in words is "ninety-eight billion, seven hundred twenty-one million, four hundred twenty-eight thousand, four hundred sixty-five".