1995791616 has 576 divisors, whose sum is σ = 7691980800. Its totient is φ = 495673344.

The previous prime is 1995791593. The next prime is 1995791669. The reversal of 1995791616 is 6161975991.

It is a happy number.

1995791616 is a `hidden beast` number, since 1 + 9 + 9 + 579 + 1 + 61 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11950765 + ... + 11950931.

Almost surely, 2^1995791616 is an apocalyptic number.

1995791616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1995791616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3845990400).

1995791616 is an abundant number, since it is smaller than the sum of its proper divisors (5696189184).

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

1995791616 is a wasteful number, since it uses less digits than its factorization.

1995791616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 211 counting only the distinct ones).

The product of its digits is 918540, while the sum is 54.

The square root of 1995791616 is about 44674.2836092533. The cubic root of 1995791616 is about 1259.0367240762.

The spelling of 1995791616 in words is "one billion, nine hundred ninety-five million, seven hundred ninety-one thousand, six hundred sixteen".