76616556242640 has 160 divisors (see below), whose sum is σ = 250076966430720. Its totient is φ = 19350725755392.

The previous prime is 76616556242573. The next prime is 76616556242651. The reversal of 76616556242640 is 4624265561667.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15358557 + ... + 19726083.

It is an arithmetic number, because the mean of its divisors is an integer number (1562981040192).

Almost surely, 2^{76616556242640} 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 76616556242640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125038483215360).

76616556242640 is an abundant number, since it is smaller than the sum of its proper divisors (173460410188080).

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

76616556242640 is a wasteful number, since it uses less digits than its factorization.

76616556242640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371409 (or 4371403 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 60.

The spelling of 76616556242640 in words is "seventy-six trillion, six hundred sixteen billion, five hundred fifty-six million, two hundred forty-two thousand, six hundred forty".