78428390361 has 8 divisors (see below), whose sum is σ = 110074933920. Its totient is φ = 49533720192.

The previous prime is 78428390357. The next prime is 78428390363. The reversal of 78428390361 is 16309382487.

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

It is not a de Polignac number, because 78428390361 - 2² = 78428390357 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78428390363) 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, 687968280 + ... + 687968393.

It is an arithmetic number, because the mean of its divisors is an integer number (13759366740).

Almost surely, 2^78428390361 is an apocalyptic number.

It is an amenable number.

78428390361 is a deficient number, since it is larger than the sum of its proper divisors (31646543559).

78428390361 is a wasteful number, since it uses less digits than its factorization.

78428390361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375936695.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 78428390361 in words is "seventy-eight billion, four hundred twenty-eight million, three hundred ninety thousand, three hundred sixty-one".