78238227518 has 32 divisors (see below), whose sum is σ = 134612451072. Its totient is φ = 33756923200.

The previous prime is 78238227497. The next prime is 78238227523. The reversal of 78238227518 is 81572283287.

It is a super-2 number, since 2×78238227518² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78238227518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523871 + ... + 656442.

It is an arithmetic number, because the mean of its divisors is an integer number (4206639096).

Almost surely, 2^78238227518 is an apocalyptic number.

78238227518 is a deficient number, since it is larger than the sum of its proper divisors (56374223554).

78238227518 is a wasteful number, since it uses less digits than its factorization.

78238227518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180480.

The product of its digits is 3010560, while the sum is 53.

The spelling of 78238227518 in words is "seventy-eight billion, two hundred thirty-eight million, two hundred twenty-seven thousand, five hundred eighteen".