77006508420 has 48 divisors (see below), whose sum is σ = 217316026368. Its totient is φ = 20373373440.

The previous prime is 77006508407. The next prime is 77006508437. The reversal of 77006508420 is 2480560077.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5045301 + ... + 5060540.

It is an arithmetic number, because the mean of its divisors is an integer number (4527417216).

Almost surely, 2^77006508420 is an apocalyptic number.

It is an amenable number.

77006508420 is an abundant number, since it is smaller than the sum of its proper divisors (140309517948).

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

77006508420 is a wasteful number, since it uses less digits than its factorization.

77006508420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105980 (or 10105978 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The spelling of 77006508420 in words is "seventy-seven billion, six million, five hundred eight thousand, four hundred twenty".