2251221452645 has 32 divisors (see below), whose sum is σ = 3007559009664. Its totient is φ = 1603738656000.

The previous prime is 2251221452621. The next prime is 2251221452651. The reversal of 2251221452645 is 5462541221522.

It is a de Polignac number, because none of the positive numbers 2^k-2251221452645 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1156970 + ... + 2416820.

It is an arithmetic number, because the mean of its divisors is an integer number (93986219052).

Almost surely, 2^{2251221452645} is an apocalyptic number.

It is an amenable number.

2251221452645 is a deficient number, since it is larger than the sum of its proper divisors (756337557019).

2251221452645 is a wasteful number, since it uses less digits than its factorization.

2251221452645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260533.

The product of its digits is 384000, while the sum is 41.

The spelling of 2251221452645 in words is "two trillion, two hundred fifty-one billion, two hundred twenty-one million, four hundred fifty-two thousand, six hundred forty-five".