775427397216 has 48 divisors (see below), whose sum is σ = 2036696813424. Its totient is φ = 258323431424.

The previous prime is 775427397211. The next prime is 775427397223. The reversal of 775427397216 is 612793724577.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 775427397216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775427397211) 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, 2216985 + ... + 2542808.

It is an arithmetic number, because the mean of its divisors is an integer number (42431183613).

Almost surely, 2^775427397216 is an apocalyptic number.

It is an amenable number.

775427397216 is an abundant number, since it is smaller than the sum of its proper divisors (1261269416208).

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

775427397216 is a wasteful number, since it uses less digits than its factorization.

775427397216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761503 (or 4761495 counting only the distinct ones).

The product of its digits is 31116960, while the sum is 60.

The spelling of 775427397216 in words is "seven hundred seventy-five billion, four hundred twenty-seven million, three hundred ninety-seven thousand, two hundred sixteen".