78344527618 has 16 divisors (see below), whose sum is σ = 134329737024. Its totient is φ = 33570018000.

The previous prime is 78344527601. The next prime is 78344527633. The reversal of 78344527618 is 81672544387.

It is a super-2 number, since 2×78344527618² (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 7 ways as a sum of consecutive naturals, for example, 438508 + ... + 590743.

It is an arithmetic number, because the mean of its divisors is an integer number (8395608564).

Almost surely, 2^78344527618 is an apocalyptic number.

78344527618 is a deficient number, since it is larger than the sum of its proper divisors (55985209406).

78344527618 is a wasteful number, since it uses less digits than its factorization.

78344527618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034697.

The product of its digits is 9031680, while the sum is 55.

The spelling of 78344527618 in words is "seventy-eight billion, three hundred forty-four million, five hundred twenty-seven thousand, six hundred eighteen".