1661548454 has 8 divisors (see below), whose sum is σ = 2510253480. Its totient is φ = 824797296.

The previous prime is 1661548453. The next prime is 1661548457. The reversal of 1661548454 is 4548451661.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661548453) 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, 2988119 + ... + 2988674.

It is an arithmetic number, because the mean of its divisors is an integer number (313781685).

Almost surely, 2^1661548454 is an apocalyptic number.

1661548454 is a deficient number, since it is larger than the sum of its proper divisors (848705026).

1661548454 is a wasteful number, since it uses less digits than its factorization.

1661548454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5976934.

The product of its digits is 460800, while the sum is 44.

The square root of 1661548454 is about 40762.0957998972. The cubic root of 1661548454 is about 1184.4161945920.

The spelling of 1661548454 in words is "one billion, six hundred sixty-one million, five hundred forty-eight thousand, four hundred fifty-four".