1964765121 has 8 divisors (see below), whose sum is σ = 2857840224. Its totient is φ = 1190766720.

The previous prime is 1964765093. The next prime is 1964765147. The reversal of 1964765121 is 1215674691.

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

It is not a de Polignac number, because 1964765121 - 2⁹ = 1964764609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1964765161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29769136 + ... + 29769201.

It is an arithmetic number, because the mean of its divisors is an integer number (357230028).

Almost surely, 2^1964765121 is an apocalyptic number.

1964765121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1964765121 is a deficient number, since it is larger than the sum of its proper divisors (893075103).

1964765121 is a wasteful number, since it uses less digits than its factorization.

1964765121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59538351.

The product of its digits is 90720, while the sum is 42.

The square root of 1964765121 is about 44325.6711285909. The cubic root of 1964765121 is about 1252.4783089538.

The spelling of 1964765121 in words is "one billion, nine hundred sixty-four million, seven hundred sixty-five thousand, one hundred twenty-one".