1649143454 has 8 divisors (see below), whose sum is σ = 2827103088. Its totient is φ = 706775760.

The previous prime is 1649143421. The next prime is 1649143459. The reversal of 1649143454 is 4543419461.

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 (1649143459) 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, 58897967 + ... + 58897994.

It is an arithmetic number, because the mean of its divisors is an integer number (353387886).

Almost surely, 2^1649143454 is an apocalyptic number.

1649143454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1649143454 is a deficient number, since it is larger than the sum of its proper divisors (1177959634).

1649143454 is a wasteful number, since it uses less digits than its factorization.

1649143454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117795970.

The product of its digits is 207360, while the sum is 41.

The square root of 1649143454 is about 40609.6473020882. The cubic root of 1649143454 is about 1181.4612401110.

The spelling of 1649143454 in words is "one billion, six hundred forty-nine million, one hundred forty-three thousand, four hundred fifty-four".