8901821222465 has 8 divisors (see below), whose sum is σ = 10684711428840. Its totient is φ = 7119773003392.

The previous prime is 8901821222443. The next prime is 8901821222491. The reversal of 8901821222465 is 5642221281098.

It is a Cunningham number, because it is equal to 2983592²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 2689678720576 + 6212142501889 = 1640024^2 + 2492417^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8901821222465 - 2⁶ = 8901821222401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210473564 + ... + 210515853.

It is an arithmetic number, because the mean of its divisors is an integer number (1335588928605).

Almost surely, 2^{8901821222465} is an apocalyptic number.

It is an amenable number.

8901821222465 is a deficient number, since it is larger than the sum of its proper divisors (1782890206375).

8901821222465 is a wasteful number, since it uses less digits than its factorization.

8901821222465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420993651.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 8901821222465 in words is "eight trillion, nine hundred one billion, eight hundred twenty-one million, two hundred twenty-two thousand, four hundred sixty-five".