77490534919220 has 192 divisors, whose sum is σ = 173121424519680. Its totient is φ = 29072692070400.

The previous prime is 77490534919181. The next prime is 77490534919223. The reversal of 77490534919220 is 2291943509477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77490534919223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15582248654 + ... + 15582253626.

It is an arithmetic number, because the mean of its divisors is an integer number (901674086040).

Almost surely, 2^{77490534919220} 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 77490534919220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86560712259840).

77490534919220 is an abundant number, since it is smaller than the sum of its proper divisors (95630889600460).

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

77490534919220 is a wasteful number, since it uses less digits than its factorization.

77490534919220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666 (or 6664 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 62.

The spelling of 77490534919220 in words is "seventy-seven trillion, four hundred ninety billion, five hundred thirty-four million, nine hundred nineteen thousand, two hundred twenty".