77808254773540 has 24 divisors (see below), whose sum is σ = 163828462573440. Its totient is φ = 31041182376288.

The previous prime is 77808254773507. The next prime is 77808254773547. The reversal of 77808254773540 is 4537745280877.

It is a super-2 number, since 2×77808254773540² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77808254773547) 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 7 ways as a sum of consecutive naturals, for example, 5132463052 + ... + 5132478211.

It is an arithmetic number, because the mean of its divisors is an integer number (6826185940560).

Almost surely, 2^{77808254773540} is an apocalyptic number.

It is an amenable number.

77808254773540 is an abundant number, since it is smaller than the sum of its proper divisors (86020207799900).

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

77808254773540 is a wasteful number, since it uses less digits than its factorization.

77808254773540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10264941651 (or 10264941649 counting only the distinct ones).

The product of its (nonzero) digits is 368793600, while the sum is 67.

The spelling of 77808254773540 in words is "seventy-seven trillion, eight hundred eight billion, two hundred fifty-four million, seven hundred seventy-three thousand, five hundred forty".