1964655155 has 4 divisors (see below), whose sum is σ = 2357586192. Its totient is φ = 1571724120.

The previous prime is 1964655151. The next prime is 1964655191. The reversal of 1964655155 is 5515564691.

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

It is not a de Polignac number, because 1964655155 - 2² = 1964655151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1964655151) 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, 196465511 + ... + 196465520.

It is an arithmetic number, because the mean of its divisors is an integer number (589396548).

Almost surely, 2^1964655155 is an apocalyptic number.

1964655155 is a deficient number, since it is larger than the sum of its proper divisors (392931037).

1964655155 is an equidigital number, since it uses as much as digits as its factorization.

1964655155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392931036.

The product of its digits is 810000, while the sum is 47.

The square root of 1964655155 is about 44324.4306788029. The cubic root of 1964655155 is about 1252.4549418521.

The spelling of 1964655155 in words is "one billion, nine hundred sixty-four million, six hundred fifty-five thousand, one hundred fifty-five".