77798028955 has 16 divisors (see below), whose sum is σ = 93854234880. Its totient is φ = 61907822208.

The previous prime is 77798028949. The next prime is 77798029003. The reversal of 77798028955 is 55982089777.

It is a cyclic number.

It is not a de Polignac number, because 77798028955 - 2³¹ = 75650545307 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1341949 + ... + 1398721.

It is an arithmetic number, because the mean of its divisors is an integer number (5865889680).

Almost surely, 2^77798028955 is an apocalyptic number.

77798028955 is a deficient number, since it is larger than the sum of its proper divisors (16056205925).

77798028955 is a wasteful number, since it uses less digits than its factorization.

77798028955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58230.

The product of its (nonzero) digits is 88905600, while the sum is 67.

The spelling of 77798028955 in words is "seventy-seven billion, seven hundred ninety-eight million, twenty-eight thousand, nine hundred fifty-five".