78548211381 has 8 divisors (see below), whose sum is σ = 104738665120. Its totient is φ = 52361615952.

The previous prime is 78548211361. The next prime is 78548211407. The reversal of 78548211381 is 18311284587.

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

It is not a de Polignac number, because 78548211381 - 2⁵ = 78548211349 is a prime.

It is a super-2 number, since 2×78548211381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78548211381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78548211361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 916735 + ... + 998748.

It is an arithmetic number, because the mean of its divisors is an integer number (13092333140).

Almost surely, 2^78548211381 is an apocalyptic number.

It is an amenable number.

78548211381 is a deficient number, since it is larger than the sum of its proper divisors (26190453739).

78548211381 is a wasteful number, since it uses less digits than its factorization.

78548211381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929155.

The product of its digits is 430080, while the sum is 48.

The spelling of 78548211381 in words is "seventy-eight billion, five hundred forty-eight million, two hundred eleven thousand, three hundred eighty-one".