78181347268420 has 96 divisors (see below), whose sum is σ = 179232363991296. Its totient is φ = 28409584896000.

The previous prime is 78181347268397. The next prime is 78181347268463. The reversal of 78181347268420 is 2486274318187.

It is a super-2 number, since 2×78181347268420² (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 31 ways as a sum of consecutive naturals, for example, 4942860352 + ... + 4942876168.

It is an arithmetic number, because the mean of its divisors is an integer number (1867003791576).

Almost surely, 2^{78181347268420} is an apocalyptic number.

It is an amenable number.

78181347268420 is an abundant number, since it is smaller than the sum of its proper divisors (101051016722876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78181347268420 is a wasteful number, since it uses less digits than its factorization.

78181347268420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30221 (or 30219 counting only the distinct ones).

The product of its (nonzero) digits is 28901376, while the sum is 61.

The spelling of 78181347268420 in words is "seventy-eight trillion, one hundred eighty-one billion, three hundred forty-seven million, two hundred sixty-eight thousand, four hundred twenty".