1645414242251 has 8 divisors (see below), whose sum is σ = 1772496307680. Its totient is φ = 1518405282432.

The previous prime is 1645414242247. The next prime is 1645414242259. The reversal of 1645414242251 is 1522424145461.

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 1645414242251 - 2² = 1645414242247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1645414242199 and 1645414242208.

It is not an unprimeable number, because it can be changed into a prime (1645414242259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18229646 + ... + 18319683.

It is an arithmetic number, because the mean of its divisors is an integer number (221562038460).

Almost surely, 2^{1645414242251} is an apocalyptic number.

1645414242251 is a deficient number, since it is larger than the sum of its proper divisors (127082065429).

1645414242251 is a wasteful number, since it uses less digits than its factorization.

1645414242251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36552805.

The product of its digits is 307200, while the sum is 41.

The spelling of 1645414242251 in words is "one trillion, six hundred forty-five billion, four hundred fourteen million, two hundred forty-two thousand, two hundred fifty-one".