1661454135 has 48 divisors (see below), whose sum is σ = 3181501440. Its totient is φ = 795337920.

The previous prime is 1661454103. The next prime is 1661454139. The reversal of 1661454135 is 5314541661.

1661454135 is a `hidden beast` number, since 1 + 6 + 614 + 5 + 4 + 1 + 35 = 666.

It is not a de Polignac number, because 1661454135 - 2⁵ = 1661454103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1661454135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661454139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17862 + ... + 60348.

It is an arithmetic number, because the mean of its divisors is an integer number (66281280).

Almost surely, 2^1661454135 is an apocalyptic number.

1661454135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1661454135 is a deficient number, since it is larger than the sum of its proper divisors (1520047305).

1661454135 is a wasteful number, since it uses less digits than its factorization.

1661454135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42588 (or 42585 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 1661454135 is about 40760.9388385498. The cubic root of 1661454135 is about 1184.3937827539.

Adding to 1661454135 its reverse (5314541661), we get a palindrome (6975995796).

The spelling of 1661454135 in words is "one billion, six hundred sixty-one million, four hundred fifty-four thousand, one hundred thirty-five".