77738285523540 has 24 divisors (see below), whose sum is σ = 217667199466080. Its totient is φ = 20730209472928.

The previous prime is 77738285523529. The next prime is 77738285523559. The reversal of 77738285523540 is 4532558283777.

It is a happy number.

It is a super-3 number, since 3×77738285523540³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647819045970 + ... + 647819046089.

It is an arithmetic number, because the mean of its divisors is an integer number (9069466644420).

Almost surely, 2^{77738285523540} is an apocalyptic number.

It is an amenable number.

77738285523540 is an abundant number, since it is smaller than the sum of its proper divisors (139928913942540).

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

77738285523540 is a wasteful number, since it uses less digits than its factorization.

77738285523540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295638092071 (or 1295638092069 counting only the distinct ones).

The product of its (nonzero) digits is 395136000, while the sum is 66.

The spelling of 77738285523540 in words is "seventy-seven trillion, seven hundred thirty-eight billion, two hundred eighty-five million, five hundred twenty-three thousand, five hundred forty".