1002001995738 has 24 divisors (see below), whose sum is σ = 2188098851328. Its totient is φ = 331370737992.

The previous prime is 1002001995737. The next prime is 1002001995767. The reversal of 1002001995738 is 8375991002001.

It is a super-3 number, since 3×1002001995738³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1002001995693 and 1002001995702.

It is not an unprimeable number, because it can be changed into a prime (1002001995733) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219158256 + ... + 219162827.

It is an arithmetic number, because the mean of its divisors is an integer number (91170785472).

Almost surely, 2^{1002001995738} is an apocalyptic number.

1002001995738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1002001995738 is an abundant number, since it is smaller than the sum of its proper divisors (1186096855590).

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

1002001995738 is a wasteful number, since it uses less digits than its factorization.

1002001995738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438321218 (or 438321215 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

Adding to 1002001995738 its reverse (8375991002001), we get a palindrome (9377992997739).

The spelling of 1002001995738 in words is "one trillion, two billion, one million, nine hundred ninety-five thousand, seven hundred thirty-eight".