1353616661 has 8 divisors (see below), whose sum is σ = 1392051744. Its totient is φ = 1315659280.

The previous prime is 1353616613. The next prime is 1353616679. The reversal of 1353616661 is 1666163531.

It is a happy number.

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

It is not a de Polignac number, because 1353616661 - 2¹⁴ = 1353600277 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 (1353616261) 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, 113675 + ... + 125016.

It is an arithmetic number, because the mean of its divisors is an integer number (174006468).

Almost surely, 2^1353616661 is an apocalyptic number.

It is an amenable number.

1353616661 is a deficient number, since it is larger than the sum of its proper divisors (38435083).

1353616661 is a wasteful number, since it uses less digits than its factorization.

1353616661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238851.

The product of its digits is 58320, while the sum is 38.

The square root of 1353616661 is about 36791.5297453096. The cubic root of 1353616661 is about 1106.1955245883.

The spelling of 1353616661 in words is "one billion, three hundred fifty-three million, six hundred sixteen thousand, six hundred sixty-one".