680401136861002 has 8 divisors (see below), whose sum is σ = 1020737261391300. Its totient is φ = 340155383063904.

The previous prime is 680401136860961. The next prime is 680401136861021. The reversal of 680401136861002 is 200168631104086.

It can be written as a sum of positive squares in 2 ways, for example, as 584667612369801 + 95733524491201 = 24179901^2 + 9784351^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22592664477 + ... + 22592694592.

Almost surely, 2^{680401136861002} is an apocalyptic number.

680401136861002 is a deficient number, since it is larger than the sum of its proper divisors (340336124530298).

680401136861002 is a wasteful number, since it uses less digits than its factorization.

680401136861002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45185366600.

The product of its (nonzero) digits is 331776, while the sum is 46.

Adding to 680401136861002 its reverse (200168631104086), we get a palindrome (880569767965088).

The spelling of 680401136861002 in words is "six hundred eighty trillion, four hundred one billion, one hundred thirty-six million, eight hundred sixty-one thousand, two".