778426740090 has 36 divisors (see below), whose sum is σ = 2023931286702. Its totient is φ = 207578232000.

The previous prime is 778426740089. The next prime is 778426740127. The reversal of 778426740090 is 90047624877.

778426740090 is a `hidden beast` number, since 77 + 84 + 2 + 6 + 7 + 400 + 90 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 774134262801 + 4292477289 = 879849^2 + 65517^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8323590 + ... + 8416590.

Almost surely, 2^778426740090 is an apocalyptic number.

778426740090 is an abundant number, since it is smaller than the sum of its proper divisors (1245504546612).

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

778426740090 is an frugal number, since it uses more digits than its factorization.

778426740090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186015 (or 93011 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 778426740090 in words is "seven hundred seventy-eight billion, four hundred twenty-six million, seven hundred forty thousand, ninety".