77641407718 has 16 divisors (see below), whose sum is σ = 133103153664. Its totient is φ = 33273989640.

The previous prime is 77641407689. The next prime is 77641407721. The reversal of 77641407718 is 81770414677.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 889171 + ... + 972577.

It is an arithmetic number, because the mean of its divisors is an integer number (8318947104).

Almost surely, 2^77641407718 is an apocalyptic number.

77641407718 is a deficient number, since it is larger than the sum of its proper divisors (55461745946).

77641407718 is a wasteful number, since it uses less digits than its factorization.

77641407718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149907.

The product of its (nonzero) digits is 1843968, while the sum is 52.

The spelling of 77641407718 in words is "seventy-seven billion, six hundred forty-one million, four hundred seven thousand, seven hundred eighteen".