10187789670778 has 4 divisors (see below), whose sum is σ = 15281684506170. Its totient is φ = 5093894835388.

The previous prime is 10187789670731. The next prime is 10187789670841. The reversal of 10187789670778 is 87707698778101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7248495443809 + 2939294226969 = 2692303^2 + 1714437^2 .

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2546947417693 + ... + 2546947417696.

Almost surely, 2^{10187789670778} is an apocalyptic number.

10187789670778 is a deficient number, since it is larger than the sum of its proper divisors (5093894835392).

10187789670778 is an equidigital number, since it uses as much as digits as its factorization.

10187789670778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5093894835391.

The product of its (nonzero) digits is 464679936, while the sum is 76.

The spelling of 10187789670778 in words is "ten trillion, one hundred eighty-seven billion, seven hundred eighty-nine million, six hundred seventy thousand, seven hundred seventy-eight".