1546132661 has 4 divisors (see below), whose sum is σ = 1547548332. Its totient is φ = 1544716992.

The previous prime is 1546132649. The next prime is 1546132663. The reversal of 1546132661 is 1662316451.

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 1202771761 + 343360900 = 34681^2 + 18530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1546132661 - 2⁶ = 1546132597 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 (1546132663) 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, 706196 + ... + 708381.

It is an arithmetic number, because the mean of its divisors is an integer number (386887083).

Almost surely, 2^1546132661 is an apocalyptic number.

It is an amenable number.

1546132661 is a deficient number, since it is larger than the sum of its proper divisors (1415671).

1546132661 is a wasteful number, since it uses less digits than its factorization.

1546132661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415670.

The product of its digits is 25920, while the sum is 35.

The square root of 1546132661 is about 39320.8934410194. The cubic root of 1546132661 is about 1156.3312202172.

The spelling of 1546132661 in words is "one billion, five hundred forty-six million, one hundred thirty-two thousand, six hundred sixty-one".