11661203021461 has 8 divisors (see below), whose sum is σ = 13369941546624. Its totient is φ = 9963177591120.

The previous prime is 11661203021459. The next prime is 11661203021509. The reversal of 11661203021461 is 16412030216611.

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 11661203021461 - 2¹ = 11661203021459 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 (11661203024461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2678271370 + ... + 2678275723.

It is an arithmetic number, because the mean of its divisors is an integer number (1671242693328).

Almost surely, 2^{11661203021461} is an apocalyptic number.

It is an amenable number.

11661203021461 is a deficient number, since it is larger than the sum of its proper divisors (1708738525163).

11661203021461 is an equidigital number, since it uses as much as digits as its factorization.

11661203021461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5356547411.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 11661203021461 in words is "eleven trillion, six hundred sixty-one billion, two hundred three million, twenty-one thousand, four hundred sixty-one".