770381550 has 192 divisors, whose sum is σ = 2270568960. Its totient is φ = 191600640.

The previous prime is 770381531. The next prime is 770381561. The reversal of 770381550 is 55183077.

770381550 is a `hidden beast` number, since 7 + 70 + 38 + 1 + 550 = 666.

770381550 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1334862 + ... + 1335438.

It is an arithmetic number, because the mean of its divisors is an integer number (11825880).

Almost surely, 2^770381550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 770381550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135284480).

770381550 is an abundant number, since it is smaller than the sum of its proper divisors (1500187410).

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

770381550 is a wasteful number, since it uses less digits than its factorization.

770381550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 770381550 is about 27755.7480533312. The cubic root of 770381550 is about 916.7170124782.

It can be divided in two parts, 7703 and 81550, that added together give a triangular number (89253 = T₄₂₂).

The spelling of 770381550 in words is "seven hundred seventy million, three hundred eighty-one thousand, five hundred fifty".