1219530697561 has 8 divisors (see below), whose sum is σ = 1388240478144. Its totient is φ = 1060461475920.

The previous prime is 1219530697549. The next prime is 1219530697577. The reversal of 1219530697561 is 1657960359121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1219530697561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219530697531) 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, 2410139466 + ... + 2410139971.

It is an arithmetic number, because the mean of its divisors is an integer number (173530059768).

Almost surely, 2^{1219530697561} is an apocalyptic number.

1219530697561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1219530697561 is a deficient number, since it is larger than the sum of its proper divisors (168709780583).

1219530697561 is a wasteful number, since it uses less digits than its factorization.

1219530697561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4820279471.

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 1219530697561 in words is "one trillion, two hundred nineteen billion, five hundred thirty million, six hundred ninety-seven thousand, five hundred sixty-one".