78728570402 has 8 divisors (see below), whose sum is σ = 120605469696. Its totient is φ = 38526747172.

The previous prime is 78728570387. The next prime is 78728570407. The reversal of 78728570402 is 20407582787.

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

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 3 ways as a sum of consecutive naturals, for example, 418768898 + ... + 418769085.

It is an arithmetic number, because the mean of its divisors is an integer number (15075683712).

Almost surely, 2^78728570402 is an apocalyptic number.

78728570402 is a deficient number, since it is larger than the sum of its proper divisors (41876899294).

78728570402 is a wasteful number, since it uses less digits than its factorization.

78728570402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837538032.

The product of its (nonzero) digits is 1756160, while the sum is 50.

The spelling of 78728570402 in words is "seventy-eight billion, seven hundred twenty-eight million, five hundred seventy thousand, four hundred two".