1965280895 has 4 divisors (see below), whose sum is σ = 2358337080. Its totient is φ = 1572224712.

The previous prime is 1965280873. The next prime is 1965280897. The reversal of 1965280895 is 5980825691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5980825691 = 31 ⋅192929861.

It is a cyclic number.

It is not a de Polignac number, because 1965280895 - 2²² = 1961086591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965280897) 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, 196528085 + ... + 196528094.

It is an arithmetic number, because the mean of its divisors is an integer number (589584270).

Almost surely, 2^1965280895 is an apocalyptic number.

1965280895 is a deficient number, since it is larger than the sum of its proper divisors (393056185).

1965280895 is an equidigital number, since it uses as much as digits as its factorization.

1965280895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393056184.

The product of its (nonzero) digits is 1555200, while the sum is 53.

The square root of 1965280895 is about 44331.4887523530. The cubic root of 1965280895 is about 1252.5878961374.

The spelling of 1965280895 in words is "one billion, nine hundred sixty-five million, two hundred eighty thousand, eight hundred ninety-five".