78248638403 has 8 divisors (see below), whose sum is σ = 84833322000. Its totient is φ = 71744748768.

The previous prime is 78248638393. The next prime is 78248638439. The reversal of 78248638403 is 30483684287.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78248638403 - 2¹² = 78248634307 is a prime.

It is a super-2 number, since 2×78248638403² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78248638493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20196473 + ... + 20200346.

It is an arithmetic number, because the mean of its divisors is an integer number (10604165250).

Almost surely, 2^78248638403 is an apocalyptic number.

78248638403 is a deficient number, since it is larger than the sum of its proper divisors (6584683597).

78248638403 is a wasteful number, since it uses less digits than its factorization.

78248638403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40396981.

The product of its (nonzero) digits is 6193152, while the sum is 53.

The spelling of 78248638403 in words is "seventy-eight billion, two hundred forty-eight million, six hundred thirty-eight thousand, four hundred three".