7778274573996 has 72 divisors (see below), whose sum is σ = 20124087087104. Its totient is φ = 2531821108320.

The previous prime is 7778274573991. The next prime is 7778274574121. The reversal of 7778274573996 is 6993754728777.

7778274573996 is a `hidden beast` number, since 7 + 7 + 78 + 2 + 7 + 457 + 3 + 9 + 96 = 666.

It is not an unprimeable number, because it can be changed into a prime (7778274573991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5507601 + ... + 6774231.

Almost surely, 2^{7778274573996} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7778274573996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10062043543552).

7778274573996 is an abundant number, since it is smaller than the sum of its proper divisors (12345812513108).

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

7778274573996 is a wasteful number, since it uses less digits than its factorization.

7778274573996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270651 (or 1270646 counting only the distinct ones).

The product of its digits is 7841473920, while the sum is 81.

The spelling of 7778274573996 in words is "seven trillion, seven hundred seventy-eight billion, two hundred seventy-four million, five hundred seventy-three thousand, nine hundred ninety-six".