99421472641 has 4 divisors (see below), whose sum is σ = 99422208000. Its totient is φ = 99420737284.

The previous prime is 99421472639. The next prime is 99421472651. The reversal of 99421472641 is 14627412499.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 99421472641 - 2¹ = 99421472639 is a prime.

It is a super-2 number, since 2×99421472641² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99421472611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99841 + ... + 456958.

It is an arithmetic number, because the mean of its divisors is an integer number (24855552000).

Almost surely, 2^99421472641 is an apocalyptic number.

It is an amenable number.

99421472641 is a deficient number, since it is larger than the sum of its proper divisors (735359).

99421472641 is a wasteful number, since it uses less digits than its factorization.

99421472641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735358.

The product of its digits is 870912, while the sum is 49.

The spelling of 99421472641 in words is "ninety-nine billion, four hundred twenty-one million, four hundred seventy-two thousand, six hundred forty-one".