1954561648 has 20 divisors (see below), whose sum is σ = 4078268488. Its totient is φ = 902105280.

The previous prime is 1954561639. The next prime is 1954561649. The reversal of 1954561648 is 8461654591.

It is a happy number.

It is a super-2 number, since 2×1954561648² = 7640622471664951808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1954561649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4698258 + ... + 4698673.

Almost surely, 2^1954561648 is an apocalyptic number.

It is an amenable number.

1954561648 is an abundant number, since it is smaller than the sum of its proper divisors (2123706840).

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

1954561648 is a wasteful number, since it uses less digits than its factorization.

1954561648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9396952 (or 9396946 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 49.

The square root of 1954561648 is about 44210.4246530159. The cubic root of 1954561648 is about 1250.3064097910.

The spelling of 1954561648 in words is "one billion, nine hundred fifty-four million, five hundred sixty-one thousand, six hundred forty-eight".