78298390827 has 16 divisors (see below), whose sum is σ = 117631388160. Its totient is φ = 51463729800.

The previous prime is 78298390801. The next prime is 78298390853. The reversal of 78298390827 is 72809389287.

It is a happy number.

78298390827 is a `hidden beast` number, since 7 + 82 + 98 + 390 + 82 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (78298390801) and next prime (78298390853).

It is not a de Polignac number, because 78298390827 - 2⁸ = 78298390571 is a prime.

It is a super-2 number, since 2×78298390827² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78298390427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20420199 + ... + 20424032.

It is an arithmetic number, because the mean of its divisors is an integer number (7351961760).

Almost surely, 2^78298390827 is an apocalyptic number.

78298390827 is a deficient number, since it is larger than the sum of its proper divisors (39332997333).

78298390827 is a wasteful number, since it uses less digits than its factorization.

78298390827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40844311 (or 40844305 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 78298390827 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred ninety thousand, eight hundred twenty-seven".