77762215068 has 48 divisors (see below), whose sum is σ = 187989893280. Its totient is φ = 24988520704.

The previous prime is 77762215067. The next prime is 77762215087. The reversal of 77762215068 is 86051226777.

It is a self number, because there is not a number n which added to its sum of digits gives 77762215068.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77762215067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56146 + ... + 398342.

It is an arithmetic number, because the mean of its divisors is an integer number (3916456110).

Almost surely, 2^77762215068 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77762215068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93994946640).

77762215068 is an abundant number, since it is smaller than the sum of its proper divisors (110227678212).

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

77762215068 is a wasteful number, since it uses less digits than its factorization.

77762215068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342886 (or 342884 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 51.

The spelling of 77762215068 in words is "seventy-seven billion, seven hundred sixty-two million, two hundred fifteen thousand, sixty-eight".