1948809794868 has 72 divisors (see below), whose sum is σ = 5186274431520. Its totient is φ = 615313350720.

The previous prime is 1948809794843. The next prime is 1948809794957. The reversal of 1948809794868 is 8684979088491.

It is a happy number.

1948809794868 is a `hidden beast` number, since 1 + 9 + 48 + 8 + 0 + 97 + 9 + 486 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4026171 + ... + 4484157.

Almost surely, 2^{1948809794868} is an apocalyptic number.

1948809794868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1948809794868 is an abundant number, since it is smaller than the sum of its proper divisors (3237464636652).

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

1948809794868 is a wasteful number, since it uses less digits than its factorization.

1948809794868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464237 (or 464232 counting only the distinct ones).

The product of its (nonzero) digits is 2006581248, while the sum is 81.

The spelling of 1948809794868 in words is "one trillion, nine hundred forty-eight billion, eight hundred nine million, seven hundred ninety-four thousand, eight hundred sixty-eight".