7771000377440 has 24 divisors (see below), whose sum is σ = 18358988392080. Its totient is φ = 3108400150912.

The previous prime is 7771000377433. The next prime is 7771000377449. The reversal of 7771000377440 is 447730001777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7771000377449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24284376020 + ... + 24284376339.

It is an arithmetic number, because the mean of its divisors is an integer number (764957849670).

Almost surely, 2^{7771000377440} is an apocalyptic number.

It is an amenable number.

7771000377440 is an abundant number, since it is smaller than the sum of its proper divisors (10587988014640).

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

7771000377440 is a wasteful number, since it uses less digits than its factorization.

7771000377440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48568752374 (or 48568752366 counting only the distinct ones).

The product of its (nonzero) digits is 806736, while the sum is 47.

The spelling of 7771000377440 in words is "seven trillion, seven hundred seventy-one billion, three hundred seventy-seven thousand, four hundred forty".