77430706828 has 6 divisors (see below), whose sum is σ = 135503736956. Its totient is φ = 38715353412.

The previous prime is 77430706823. The next prime is 77430706831. The reversal of 77430706828 is 82860703477.

It is not an unprimeable number, because it can be changed into a prime (77430706823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9678838350 + ... + 9678838357.

Almost surely, 2^77430706828 is an apocalyptic number.

It is an amenable number.

77430706828 is a deficient number, since it is larger than the sum of its proper divisors (58073030128).

77430706828 is a wasteful number, since it uses less digits than its factorization.

77430706828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19357676711 (or 19357676709 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 52.

The spelling of 77430706828 in words is "seventy-seven billion, four hundred thirty million, seven hundred six thousand, eight hundred twenty-eight".