1161415447921 has 8 divisors (see below), whose sum is σ = 1201484617920. Its totient is φ = 1121347635408.

The previous prime is 1161415447909. The next prime is 1161415447949. The reversal of 1161415447921 is 1297445141611.

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 1161415447921 - 2¹⁷ = 1161415316849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161415447321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586610 + ... + 2200036.

It is an arithmetic number, because the mean of its divisors is an integer number (150185577240).

Almost surely, 2^{1161415447921} is an apocalyptic number.

It is an amenable number.

1161415447921 is a deficient number, since it is larger than the sum of its proper divisors (40069169999).

1161415447921 is an equidigital number, since it uses as much as digits as its factorization.

1161415447921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678743.

The product of its digits is 241920, while the sum is 46.

The spelling of 1161415447921 in words is "one trillion, one hundred sixty-one billion, four hundred fifteen million, four hundred forty-seven thousand, nine hundred twenty-one".