1995506864 has 80 divisors (see below), whose sum is σ = 4359096000. Its totient is φ = 878051328.

The previous prime is 1995506837. The next prime is 1995506867. The reversal of 1995506864 is 4686055991.

It is a happy number.

It is a super-2 number, since 2×1995506864² = 7964095288542228992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1995506867) 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, 2147552 + ... + 2148480.

It is an arithmetic number, because the mean of its divisors is an integer number (54488700).

Almost surely, 2^1995506864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1995506864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2179548000).

1995506864 is an abundant number, since it is smaller than the sum of its proper divisors (2363589136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1995506864 is a wasteful number, since it uses less digits than its factorization.

1995506864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 1416 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 53.

The square root of 1995506864 is about 44671.0965166516. The cubic root of 1995506864 is about 1258.9768430288.

The spelling of 1995506864 in words is "one billion, nine hundred ninety-five million, five hundred six thousand, eight hundred sixty-four".