4194640823778 has 12 divisors (see below), whose sum is σ = 9088388451558. Its totient is φ = 1398213607920.

The previous prime is 4194640823767. The next prime is 4194640823837. The reversal of 4194640823778 is 8773280464914.

4194640823778 is a `hidden beast` number, since 4 + 194 + 6 + 408 + 2 + 37 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4184998958529 + 9641865249 = 2045727^2 + 98193^2 .

It is a super-3 number, since 3×4194640823778³ (a number of 39 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116517800643 + ... + 116517800678.

Almost surely, 2^{4194640823778} is an apocalyptic number.

4194640823778 is an abundant number, since it is smaller than the sum of its proper divisors (4893747627780).

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

4194640823778 is a wasteful number, since it uses less digits than its factorization.

4194640823778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233035601329 (or 233035601326 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 63.

The spelling of 4194640823778 in words is "four trillion, one hundred ninety-four billion, six hundred forty million, eight hundred twenty-three thousand, seven hundred seventy-eight".