780001000002 has 64 divisors (see below), whose sum is σ = 1982283183360. Its totient is φ = 222707999232.

The previous prime is 780001000001. The next prime is 780001000007. The reversal of 780001000002 is 200000100087.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (780001000001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126703 + ... + 1255410.

It is an arithmetic number, because the mean of its divisors is an integer number (30973174740).

Almost surely, 2^780001000002 is an apocalyptic number.

780001000002 is an abundant number, since it is smaller than the sum of its proper divisors (1202282183358).

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

780001000002 is a wasteful number, since it uses less digits than its factorization.

780001000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383624 (or 1383618 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

Adding to 780001000002 its reverse (200000100087), we get a palindrome (980001100089).

The spelling of 780001000002 in words is "seven hundred eighty billion, one million, two", and thus it is an aban number.