77145556620000 has 960 divisors, whose sum is σ = 282296388439296. Its totient is φ = 18281902080000.

The previous prime is 77145556619983. The next prime is 77145556620029. The reversal of 77145556620000 is 2665554177.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 9899336104 + ... + 9899343896.

Almost surely, 2^{77145556620000} 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 77145556620000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141148194219648).

77145556620000 is an abundant number, since it is smaller than the sum of its proper divisors (205150831819296).

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

77145556620000 is a wasteful number, since it uses less digits than its factorization.

77145556620000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8173 (or 8150 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 48.

The spelling of 77145556620000 in words is "seventy-seven trillion, one hundred forty-five billion, five hundred fifty-six million, six hundred twenty thousand".