1995531264 has 264 divisors, whose sum is σ = 6253797888. Its totient is φ = 610467840.

The previous prime is 1995531257. The next prime is 1995531269. The reversal of 1995531264 is 4621355991.

1995531264 is a `hidden beast` number, since 1 + 9 + 95 + 531 + 26 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995531269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7363449 + ... + 7363719.

Almost surely, 2^1995531264 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 1995531264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3126898944).

1995531264 is an abundant number, since it is smaller than the sum of its proper divisors (4258266624).

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

1995531264 is a wasteful number, since it uses less digits than its factorization.

1995531264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 340 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 1995531264 is about 44671.3696230595. The cubic root of 1995531264 is about 1258.9819743750.

The spelling of 1995531264 in words is "one billion, nine hundred ninety-five million, five hundred thirty-one thousand, two hundred sixty-four".