78877825844368 has 20 divisors (see below), whose sum is σ = 152860544541180. Its totient is φ = 39429943382144.

The previous prime is 78877825844329. The next prime is 78877825844407. The reversal of 78877825844368 is 86344852877887.

It is an interprime number because it is at equal distance from previous prime (78877825844329) and next prime (78877825844407).

It can be written as a sum of positive squares in 2 ways, for example, as 58541045068944 + 20336780775424 = 7651212^2 + 4509632^2 .

It is a super-2 number, since 2×78877825844368² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560523703 + ... + 560664406.

It is an arithmetic number, because the mean of its divisors is an integer number (7643027227059).

Almost surely, 2^{78877825844368} is an apocalyptic number.

It is an amenable number.

78877825844368 is a deficient number, since it is larger than the sum of its proper divisors (73982718696812).

78877825844368 is a wasteful number, since it uses less digits than its factorization.

78877825844368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121192514 (or 1121192508 counting only the distinct ones).

The product of its digits is 32369541120, while the sum is 85.

The spelling of 78877825844368 in words is "seventy-eight trillion, eight hundred seventy-seven billion, eight hundred twenty-five million, eight hundred forty-four thousand, three hundred sixty-eight".