1215545450545 has 16 divisors (see below), whose sum is σ = 1464232670208. Its totient is φ = 968721189120.

The previous prime is 1215545450461. The next prime is 1215545450551. The reversal of 1215545450545 is 5450545455121.

It is not a de Polignac number, because 1215545450545 - 2²¹ = 1215543353393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1215545450495 and 1215545450504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2504880 + ... + 2950510.

It is an arithmetic number, because the mean of its divisors is an integer number (91514541888).

Almost surely, 2^{1215545450545} is an apocalyptic number.

It is an amenable number.

1215545450545 is a deficient number, since it is larger than the sum of its proper divisors (248687219663).

1215545450545 is a wasteful number, since it uses less digits than its factorization.

1215545450545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447720.

The product of its (nonzero) digits is 2000000, while the sum is 46.

The spelling of 1215545450545 in words is "one trillion, two hundred fifteen billion, five hundred forty-five million, four hundred fifty thousand, five hundred forty-five".