1915381955 has 4 divisors (see below), whose sum is σ = 2298458352. Its totient is φ = 1532305560.

The previous prime is 1915381943. The next prime is 1915381969. The reversal of 1915381955 is 5591835191.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1915381955 - 2¹⁰ = 1915380931 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191538191 + ... + 191538200.

It is an arithmetic number, because the mean of its divisors is an integer number (574614588).

Almost surely, 2^1915381955 is an apocalyptic number.

1915381955 is a deficient number, since it is larger than the sum of its proper divisors (383076397).

1915381955 is an equidigital number, since it uses as much as digits as its factorization.

1915381955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383076396.

The product of its digits is 243000, while the sum is 47.

The square root of 1915381955 is about 43765.0768878566. The cubic root of 1915381955 is about 1241.8957204766.

The spelling of 1915381955 in words is "one billion, nine hundred fifteen million, three hundred eighty-one thousand, nine hundred fifty-five".