7777421854996 has 6 divisors (see below), whose sum is σ = 13610488246250. Its totient is φ = 3888710927496.

The previous prime is 7777421854991. The next prime is 7777421854997. The reversal of 7777421854996 is 6994581247777.

It can be written as a sum of positive squares in only one way, i.e., 7495658352400 + 281763502596 = 2737820^2 + 530814^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7777421854991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972177731871 + ... + 972177731878.

Almost surely, 2^{7777421854996} is an apocalyptic number.

It is an amenable number.

7777421854996 is a deficient number, since it is larger than the sum of its proper divisors (5833066391254).

7777421854996 is a wasteful number, since it uses less digits than its factorization.

7777421854996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944355463753 (or 1944355463751 counting only the distinct ones).

The product of its digits is 1493614080, while the sum is 76.

The spelling of 7777421854996 in words is "seven trillion, seven hundred seventy-seven billion, four hundred twenty-one million, eight hundred fifty-four thousand, nine hundred ninety-six".