1215551425445 has 8 divisors (see below), whose sum is σ = 1667041954944. Its totient is φ = 833520977424.

The previous prime is 1215551425433. The next prime is 1215551425469. The reversal of 1215551425445 is 5445241555121.

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 1215551425445 - 2⁸ = 1215551425189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1215551425396 and 1215551425405.

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 7 ways as a sum of consecutive naturals, for example, 17365020329 + ... + 17365020398.

It is an arithmetic number, because the mean of its divisors is an integer number (208380244368).

Almost surely, 2^{1215551425445} is an apocalyptic number.

It is an amenable number.

1215551425445 is a deficient number, since it is larger than the sum of its proper divisors (451490529499).

1215551425445 is an equidigital number, since it uses as much as digits as its factorization.

1215551425445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34730040739.

The product of its digits is 800000, while the sum is 44.

The spelling of 1215551425445 in words is "one trillion, two hundred fifteen billion, five hundred fifty-one million, four hundred twenty-five thousand, four hundred forty-five".