78899230618 has 8 divisors (see below), whose sum is σ = 127452603348. Its totient is φ = 36415029504.

The previous prime is 78899230591. The next prime is 78899230649. The reversal of 78899230618 is 81603299887.

It can be written as a sum of positive squares in 2 ways, for example, as 78532776169 + 366454449 = 280237^2 + 19143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78899230618² (a number of 23 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, 1517292871 + ... + 1517292922.

Almost surely, 2^78899230618 is an apocalyptic number.

78899230618 is a deficient number, since it is larger than the sum of its proper divisors (48553372730).

78899230618 is a wasteful number, since it uses less digits than its factorization.

78899230618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3034585808.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 78899230618 in words is "seventy-eight billion, eight hundred ninety-nine million, two hundred thirty thousand, six hundred eighteen".