77321625150644 has 96 divisors (see below), whose sum is σ = 160957218078720. Its totient is φ = 31812176702592.

The previous prime is 77321625150499. The next prime is 77321625150647. The reversal of 77321625150644 is 44605152612377.

It is a super-2 number, since 2×77321625150644² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77321625150647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259243769 + ... + 259541855.

It is an arithmetic number, because the mean of its divisors is an integer number (1676637688320).

Almost surely, 2^{77321625150644} 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 77321625150644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80478609039360).

77321625150644 is an abundant number, since it is smaller than the sum of its proper divisors (83635592928076).

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

77321625150644 is a wasteful number, since it uses less digits than its factorization.

77321625150644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301917 (or 301915 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 77321625150644 in words is "seventy-seven trillion, three hundred twenty-one billion, six hundred twenty-five million, one hundred fifty thousand, six hundred forty-four".