1954665198 has 24 divisors (see below), whose sum is σ = 4235985936. Its totient is φ = 651420000.

The previous prime is 1954665197. The next prime is 1954665199. The reversal of 1954665198 is 8915664591.

1954665198 is a `hidden beast` number, since 1 + 9 + 546 + 6 + 5 + 1 + 98 = 666.

1954665198 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1954665197) and next prime (1954665199).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1954665197) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118263 + ... + 133773.

It is an arithmetic number, because the mean of its divisors is an integer number (176499414).

Almost surely, 2^1954665198 is an apocalyptic number.

1954665198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1954665198 is an abundant number, since it is smaller than the sum of its proper divisors (2281320738).

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

1954665198 is a wasteful number, since it uses less digits than its factorization.

1954665198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22520 (or 22517 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 1954665198 is about 44211.5957413889. The cubic root of 1954665198 is about 1250.3284892416.

The spelling of 1954665198 in words is "one billion, nine hundred fifty-four million, six hundred sixty-five thousand, one hundred ninety-eight".