1955064866 has 8 divisors (see below), whose sum is σ = 2933455980. Its totient is φ = 977246208.

The previous prime is 1955064863. The next prime is 1955064871. The reversal of 1955064866 is 6684605591.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1873071841 + 81993025 = 43279^2 + 9055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1955064863) 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, 134471 + ... + 148298.

Almost surely, 2^1955064866 is an apocalyptic number.

1955064866 is a deficient number, since it is larger than the sum of its proper divisors (978391114).

1955064866 is a wasteful number, since it uses less digits than its factorization.

1955064866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286228.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The square root of 1955064866 is about 44216.1154557928. The cubic root of 1955064866 is about 1250.4137011460.

The spelling of 1955064866 in words is "one billion, nine hundred fifty-five million, sixty-four thousand, eight hundred sixty-six".