1215545450546 has 64 divisors (see below), whose sum is σ = 2155839307776. Its totient is φ = 503013326400.

The previous prime is 1215545450461. The next prime is 1215545450551. The reversal of 1215545450546 is 6450545455121.

It is a self number, because there is not a number n which added to its sum of digits gives 1215545450546.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 541927301 + ... + 541929543.

It is an arithmetic number, because the mean of its divisors is an integer number (33684989184).

Almost surely, 2^{1215545450546} is an apocalyptic number.

1215545450546 is a deficient number, since it is larger than the sum of its proper divisors (940293857230).

1215545450546 is a wasteful number, since it uses less digits than its factorization.

1215545450546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527.

The product of its (nonzero) digits is 2400000, while the sum is 47.

The spelling of 1215545450546 in words is "one trillion, two hundred fifteen billion, five hundred forty-five million, four hundred fifty thousand, five hundred forty-six".