780028528355 has 4 divisors (see below), whose sum is σ = 936034234032. Its totient is φ = 624022822680.

The previous prime is 780028528351. The next prime is 780028528373. The reversal of 780028528355 is 553825820087.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 780028528355 - 2² = 780028528351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 780028528297 and 780028528306.

It is not an unprimeable number, because it can be changed into a prime (780028528351) 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, 78002852831 + ... + 78002852840.

It is an arithmetic number, because the mean of its divisors is an integer number (234008558508).

Almost surely, 2^780028528355 is an apocalyptic number.

780028528355 is a deficient number, since it is larger than the sum of its proper divisors (156005705677).

780028528355 is a wasteful number, since it uses less digits than its factorization.

780028528355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156005705676.

The product of its (nonzero) digits is 5376000, while the sum is 53.

The spelling of 780028528355 in words is "seven hundred eighty billion, twenty-eight million, five hundred twenty-eight thousand, three hundred fifty-five".