1649454972 has 48 divisors (see below), whose sum is σ = 4201085952. Its totient is φ = 499540480.

The previous prime is 1649454899. The next prime is 1649454973. The reversal of 1649454972 is 2794549461.

1649454972 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649454973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348373 + ... + 353075.

It is an arithmetic number, because the mean of its divisors is an integer number (87522624).

Almost surely, 2^1649454972 is an apocalyptic number.

1649454972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1649454972 is an abundant number, since it is smaller than the sum of its proper divisors (2551630980).

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

1649454972 is a wasteful number, since it uses less digits than its factorization.

1649454972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7378 (or 7376 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The square root of 1649454972 is about 40613.4826381585. The cubic root of 1649454972 is about 1181.5356268621.

The spelling of 1649454972 in words is "one billion, six hundred forty-nine million, four hundred fifty-four thousand, nine hundred seventy-two".