1215050544661 has 8 divisors (see below), whose sum is σ = 1221694687424. Its totient is φ = 1208409995520.

The previous prime is 1215050544637. The next prime is 1215050544683. The reversal of 1215050544661 is 1664450505121.

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 1215050544661 - 2¹⁷ = 1215050413589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215050544601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218931 + ... + 1574176.

It is an arithmetic number, because the mean of its divisors is an integer number (152711835928).

Almost surely, 2^{1215050544661} is an apocalyptic number.

It is an amenable number.

1215050544661 is a deficient number, since it is larger than the sum of its proper divisors (6644142763).

1215050544661 is a wasteful number, since it uses less digits than its factorization.

1215050544661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796811.

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 1215050544661 in words is "one trillion, two hundred fifteen billion, fifty million, five hundred forty-four thousand, six hundred sixty-one".