78278028055798 has 16 divisors (see below), whose sum is σ = 119918477695680. Its totient is φ = 38305246611136.

The previous prime is 78278028055781. The next prime is 78278028055811. The reversal of 78278028055798 is 89755082087287.

It is a super-2 number, since 2×78278028055798² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7566961 + ... + 14622412.

It is an arithmetic number, because the mean of its divisors is an integer number (7494904855980).

Almost surely, 2^{78278028055798} is an apocalyptic number.

78278028055798 is a deficient number, since it is larger than the sum of its proper divisors (41640449639882).

78278028055798 is a wasteful number, since it uses less digits than its factorization.

78278028055798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22226951.

The product of its (nonzero) digits is 1264435200, while the sum is 76.

The spelling of 78278028055798 in words is "seventy-eight trillion, two hundred seventy-eight billion, twenty-eight million, fifty-five thousand, seven hundred ninety-eight".