78728570403 has 8 divisors (see below), whose sum is σ = 119967345408. Its totient is φ = 44987754504.

The previous prime is 78728570387. The next prime is 78728570407. The reversal of 78728570403 is 30407582787.

It is a happy number.

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

It is not a de Polignac number, because 78728570403 - 2⁴ = 78728570387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78728570407) 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, 1874489751 + ... + 1874489792.

It is an arithmetic number, because the mean of its divisors is an integer number (14995918176).

Almost surely, 2^78728570403 is an apocalyptic number.

78728570403 is a deficient number, since it is larger than the sum of its proper divisors (41238775005).

78728570403 is a wasteful number, since it uses less digits than its factorization.

78728570403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748979553.

The product of its (nonzero) digits is 2634240, while the sum is 51.

The spelling of 78728570403 in words is "seventy-eight billion, seven hundred twenty-eight million, five hundred seventy thousand, four hundred three".