7977008207747 has 4 divisors (see below), whose sum is σ = 8252077456320. Its totient is φ = 7701938959176.

The previous prime is 7977008207737. The next prime is 7977008207789. The reversal of 7977008207747 is 7477028007797.

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

It is a cyclic number.

It is not a de Polignac number, because 7977008207747 - 2⁸ = 7977008207491 is a prime.

It is a super-2 number, since 2×7977008207747² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7977008207717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137534624243 + ... + 137534624300.

It is an arithmetic number, because the mean of its divisors is an integer number (2063019364080).

Almost surely, 2^{7977008207747} is an apocalyptic number.

7977008207747 is a deficient number, since it is larger than the sum of its proper divisors (275069248573).

7977008207747 is a wasteful number, since it uses less digits than its factorization.

7977008207747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275069248572.

The product of its (nonzero) digits is 67765824, while the sum is 65.

The spelling of 7977008207747 in words is "seven trillion, nine hundred seventy-seven billion, eight million, two hundred seven thousand, seven hundred forty-seven".