1955667361 has 4 divisors (see below), whose sum is σ = 1967378112. Its totient is φ = 1943956612.

The previous prime is 1955667349. The next prime is 1955667379. The reversal of 1955667361 is 1637665591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1955667361 - 2²⁷ = 1821449633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1955667341) 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, 5855125 + ... + 5855458.

It is an arithmetic number, because the mean of its divisors is an integer number (491844528).

Almost surely, 2^1955667361 is an apocalyptic number.

It is an amenable number.

1955667361 is a deficient number, since it is larger than the sum of its proper divisors (11710751).

1955667361 is a wasteful number, since it uses less digits than its factorization.

1955667361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11710750.

The product of its digits is 1020600, while the sum is 49.

The square root of 1955667361 is about 44222.9280012077. The cubic root of 1955667361 is about 1250.5421351842.

The spelling of 1955667361 in words is "one billion, nine hundred fifty-five million, six hundred sixty-seven thousand, three hundred sixty-one".