775220377156 has 27 divisors (see below), whose sum is σ = 1364299395543. Its totient is φ = 385432796160.

The previous prime is 775220377117. The next prime is 775220377231. The reversal of 775220377156 is 651773022577.

The square root of 775220377156 is 880466.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 21824152900 + 753396224256 = 147730^2 + 867984^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 339858736 + ... + 339861016.

Almost surely, 2^775220377156 is an apocalyptic number.

775220377156 is the 880466-th square number.

It is an amenable number.

775220377156 is a deficient number, since it is larger than the sum of its proper divisors (589079018387).

775220377156 is an frugal number, since it uses more digits than its factorization.

775220377156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4952 (or 2476 counting only the distinct ones).

The product of its (nonzero) digits is 4321800, while the sum is 52.

The spelling of 775220377156 in words is "seven hundred seventy-five billion, two hundred twenty million, three hundred seventy-seven thousand, one hundred fifty-six".