1415353661 has 4 divisors (see below), whose sum is σ = 1449874524. Its totient is φ = 1380832800.

The previous prime is 1415353633. The next prime is 1415353697. The reversal of 1415353661 is 1663535141.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 466344025 + 949009636 = 21595^2 + 30806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1415353661 - 2¹⁰ = 1415352637 is a prime.

It is a super-2 number, since 2×1415353661² = 4006451971412205842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1415353631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17260370 + ... + 17260451.

It is an arithmetic number, because the mean of its divisors is an integer number (362468631).

Almost surely, 2^1415353661 is an apocalyptic number.

It is an amenable number.

1415353661 is a deficient number, since it is larger than the sum of its proper divisors (34520863).

1415353661 is an equidigital number, since it uses as much as digits as its factorization.

1415353661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34520862.

The product of its digits is 32400, while the sum is 35.

The square root of 1415353661 is about 37621.1863316403. The cubic root of 1415353661 is about 1122.7635995832.

The spelling of 1415353661 in words is "one billion, four hundred fifteen million, three hundred fifty-three thousand, six hundred sixty-one".