77278582028 has 6 divisors (see below), whose sum is σ = 135237518556. Its totient is φ = 38639291012.

The previous prime is 77278582013. The next prime is 77278582033. The reversal of 77278582028 is 82028587277.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9659822750 + ... + 9659822757.

It is an arithmetic number, because the mean of its divisors is an integer number (22539586426).

Almost surely, 2^77278582028 is an apocalyptic number.

It is an amenable number.

77278582028 is a deficient number, since it is larger than the sum of its proper divisors (57958936528).

77278582028 is a wasteful number, since it uses less digits than its factorization.

77278582028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19319645511 (or 19319645509 counting only the distinct ones).

The product of its (nonzero) digits is 7024640, while the sum is 56.

The spelling of 77278582028 in words is "seventy-seven billion, two hundred seventy-eight million, five hundred eighty-two thousand, twenty-eight".