773649468540 has 192 divisors, whose sum is σ = 2592573755520. Its totient is φ = 190398781440.

The previous prime is 773649468503. The next prime is 773649468547. The reversal of 773649468540 is 45864946377.

It is a happy number.

773649468540 is a `hidden beast` number, since 7 + 7 + 3 + 6 + 49 + 46 + 8 + 540 = 666.

It is a super-3 number, since 3×773649468540³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (773649468547) 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, 54166200 + ... + 54180480.

It is an arithmetic number, because the mean of its divisors is an integer number (13502988310).

Almost surely, 2^773649468540 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 773649468540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296286877760).

773649468540 is an abundant number, since it is smaller than the sum of its proper divisors (1818924286980).

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

773649468540 is a wasteful number, since it uses less digits than its factorization.

773649468540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22029 (or 22021 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 63.

The spelling of 773649468540 in words is "seven hundred seventy-three billion, six hundred forty-nine million, four hundred sixty-eight thousand, five hundred forty".