777145166140 has 96 divisors (see below), whose sum is σ = 1877366421504. Its totient is φ = 264709969920.

The previous prime is 777145166081. The next prime is 777145166143. The reversal of 777145166140 is 41661541777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (777145166143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13363807 + ... + 13421833.

It is an arithmetic number, because the mean of its divisors is an integer number (19555900224).

Almost surely, 2^777145166140 is an apocalyptic number.

777145166140 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 777145166140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (938683210752).

777145166140 is an abundant number, since it is smaller than the sum of its proper divisors (1100221255364).

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

777145166140 is a wasteful number, since it uses less digits than its factorization.

777145166140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58667 (or 58665 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 49.

The spelling of 777145166140 in words is "seven hundred seventy-seven billion, one hundred forty-five million, one hundred sixty-six thousand, one hundred forty".