1995645953 has 16 divisors (see below), whose sum is σ = 2349494400. Its totient is φ = 1659522816.

The previous prime is 1995645907. The next prime is 1995645959. The reversal of 1995645953 is 3595465991.

It is not a de Polignac number, because 1995645953 - 2¹⁶ = 1995580417 is a prime.

It is a super-4 number, since 4×1995645953⁴ (a number of 38 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1995645959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22601 + ... + 67097.

It is an arithmetic number, because the mean of its divisors is an integer number (146843400).

Almost surely, 2^1995645953 is an apocalyptic number.

It is an amenable number.

1995645953 is a deficient number, since it is larger than the sum of its proper divisors (353848447).

1995645953 is a wasteful number, since it uses less digits than its factorization.

1995645953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44696.

The product of its digits is 6561000, while the sum is 56.

The square root of 1995645953 is about 44672.6533015446. The cubic root of 1995645953 is about 1259.0060930345.

The spelling of 1995645953 in words is "one billion, nine hundred ninety-five million, six hundred forty-five thousand, nine hundred fifty-three".