7485699821 has 16 divisors (see below), whose sum is σ = 7668154368. Its totient is φ = 7305606000.

The previous prime is 7485699817. The next prime is 7485699829. The reversal of 7485699821 is 1289965847.

It is a cyclic number.

It is not a de Polignac number, because 7485699821 - 2² = 7485699817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7485699829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5088116 + ... + 5089586.

It is an arithmetic number, because the mean of its divisors is an integer number (479259648).

Almost surely, 2^7485699821 is an apocalyptic number.

It is an amenable number.

7485699821 is a deficient number, since it is larger than the sum of its proper divisors (182454547).

7485699821 is a wasteful number, since it uses less digits than its factorization.

7485699821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192.

The product of its digits is 8709120, while the sum is 59.

The square root of 7485699821 is about 86519.9388638249. The cubic root of 7485699821 is about 1956.1889555463.

The spelling of 7485699821 in words is "seven billion, four hundred eighty-five million, six hundred ninety-nine thousand, eight hundred twenty-one".