1954981668 has 48 divisors (see below), whose sum is σ = 4859608320. Its totient is φ = 609918624.

The previous prime is 1954981597. The next prime is 1954981673. The reversal of 1954981668 is 8661894591.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32730 + ... + 70577.

It is an arithmetic number, because the mean of its divisors is an integer number (101241840).

Almost surely, 2^1954981668 is an apocalyptic number.

It is an amenable number.

1954981668 is an abundant number, since it is smaller than the sum of its proper divisors (2904626652).

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

1954981668 is a wasteful number, since it uses less digits than its factorization.

1954981668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103416 (or 103414 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 57.

The square root of 1954981668 is about 44215.1746349599. The cubic root of 1954981668 is about 1250.3959637303.

The spelling of 1954981668 in words is "one billion, nine hundred fifty-four million, nine hundred eighty-one thousand, six hundred sixty-eight".