1995231680 has 56 divisors (see below), whose sum is σ = 5116628832. Its totient is φ = 736699392.

The previous prime is 1995231671. The next prime is 1995231727. The reversal of 1995231680 is 861325991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235652 + ... + 243971.

It is an arithmetic number, because the mean of its divisors is an integer number (91368372).

Almost surely, 2^1995231680 is an apocalyptic number.

1995231680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1995231680 is an abundant number, since it is smaller than the sum of its proper divisors (3121397152).

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

1995231680 is a wasteful number, since it uses less digits than its factorization.

1995231680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479653 (or 479643 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1995231680 is about 44668.0162980180. The cubic root of 1995231680 is about 1258.9189686417.

The spelling of 1995231680 in words is "one billion, nine hundred ninety-five million, two hundred thirty-one thousand, six hundred eighty".