1547661132 has 18 divisors (see below), whose sum is σ = 3912143508. Its totient is φ = 515887032.

The previous prime is 1547661107. The next prime is 1547661187. The reversal of 1547661132 is 2311667451.

1547661132 is a `hidden beast` number, since 1 + 5 + 4 + 7 + 6 + 611 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 42990587 = 1547661132 / (1 + 5 + 4 + 7 + 6 + 6 + 1 + 1 + 3 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21495258 + ... + 21495329.

It is an arithmetic number, because the mean of its divisors is an integer number (217341306).

Almost surely, 2^1547661132 is an apocalyptic number.

1547661132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1547661132 is an abundant number, since it is smaller than the sum of its proper divisors (2364482376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1547661132 is a wasteful number, since it uses less digits than its factorization.

1547661132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42990597 (or 42990592 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 1547661132 is about 39340.3245029829. The cubic root of 1547661132 is about 1156.7121354928.

The spelling of 1547661132 in words is "one billion, five hundred forty-seven million, six hundred sixty-one thousand, one hundred thirty-two".