1955557667 has 8 divisors (see below), whose sum is σ = 2311989600. Its totient is φ = 1618392384.

The previous prime is 1955557661. The next prime is 1955557673. The reversal of 1955557667 is 7667555591.

It is an interprime number because it is at equal distance from previous prime (1955557661) and next prime (1955557673).

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

It is not a de Polignac number, because 1955557667 - 2⁶ = 1955557603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1955557661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4816442 + ... + 4816847.

It is an arithmetic number, because the mean of its divisors is an integer number (288998700).

Almost surely, 2^1955557667 is an apocalyptic number.

1955557667 is a deficient number, since it is larger than the sum of its proper divisors (356431933).

1955557667 is an equidigital number, since it uses as much as digits as its factorization.

1955557667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9633325.

The product of its digits is 9922500, while the sum is 56.

The square root of 1955557667 is about 44221.6877448159. The cubic root of 1955557667 is about 1250.5187536459.

The spelling of 1955557667 in words is "one billion, nine hundred fifty-five million, five hundred fifty-seven thousand, six hundred sixty-seven".