77708672804540 has 24 divisors (see below), whose sum is σ = 163190845315680. Its totient is φ = 31082967707328.

The previous prime is 77708672804531. The next prime is 77708672804549. The reversal of 77708672804540 is 4540827680777.

It is an interprime number because it is at equal distance from previous prime (77708672804531) and next prime (77708672804549).

It is a super-2 number, since 2×77708672804540² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77708672804549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30066320 + ... + 32548439.

It is an arithmetic number, because the mean of its divisors is an integer number (6799618554820).

Almost surely, 2^{77708672804540} is an apocalyptic number.

It is an amenable number.

77708672804540 is an abundant number, since it is smaller than the sum of its proper divisors (85482172511140).

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

77708672804540 is a wasteful number, since it uses less digits than its factorization.

77708672804540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62676821 (or 62676819 counting only the distinct ones).

The product of its (nonzero) digits is 147517440, while the sum is 65.

The spelling of 77708672804540 in words is "seventy-seven trillion, seven hundred eight billion, six hundred seventy-two million, eight hundred four thousand, five hundred forty".