778275500000 has 84 divisors (see below), whose sum is σ = 1915264078056. Its totient is φ = 311310000000.

The previous prime is 778275499993. The next prime is 778275500017. The reversal of 778275500000 is 5572877.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 278276 + ... + 1278275.

It is an arithmetic number, because the mean of its divisors is an integer number (22800762834).

Almost surely, 2^778275500000 is an apocalyptic number.

It is an amenable number.

778275500000 is an abundant number, since it is smaller than the sum of its proper divisors (1136988578056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

778275500000 is an frugal number, since it uses more digits than its factorization.

778275500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556591 (or 1556558 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 41.

The spelling of 778275500000 in words is "seven hundred seventy-eight billion, two hundred seventy-five million, five hundred thousand".