2021456440025 has 48 divisors (see below), whose sum is σ = 2748544468800. Its totient is φ = 1462593888000.

The previous prime is 2021456440019. The next prime is 2021456440049. The reversal of 2021456440025 is 5200446541202.

It is not a de Polignac number, because 2021456440025 - 2¹⁶ = 2021456374489 is a prime.

It is a super-2 number, since 2×2021456440025² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187357331 + ... + 187368119.

It is an arithmetic number, because the mean of its divisors is an integer number (57261343100).

Almost surely, 2^{2021456440025} is an apocalyptic number.

2021456440025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2021456440025 is a deficient number, since it is larger than the sum of its proper divisors (727088028775).

2021456440025 is a wasteful number, since it uses less digits than its factorization.

2021456440025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14250 (or 14245 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 2021456440025 in words is "two trillion, twenty-one billion, four hundred fifty-six million, four hundred forty thousand, twenty-five".