789797814767640 has 768 divisors, whose sum is σ = 3199891557888000. Its totient is φ = 172446164352000.

The previous prime is 789797814767603. The next prime is 789797814767659. The reversal of 789797814767640 is 46767418797987.

789797814767640 is a `hidden beast` number, since 7 + 8 + 9 + 7 + 9 + 78 + 1 + 476 + 7 + 64 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (90).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 913655146 + ... + 914519174.

It is an arithmetic number, because the mean of its divisors is an integer number (4166525466000).

Almost surely, 2^{789797814767640} is an apocalyptic number.

789797814767640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 789797814767640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1599945778944000).

789797814767640 is an abundant number, since it is smaller than the sum of its proper divisors (2410093743120360).

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

789797814767640 is a wasteful number, since it uses less digits than its factorization.

789797814767640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864837 (or 864820 counting only the distinct ones).

The product of its (nonzero) digits is 50185433088, while the sum is 90.

The spelling of 789797814767640 in words is "seven hundred eighty-nine trillion, seven hundred ninety-seven billion, eight hundred fourteen million, seven hundred sixty-seven thousand, six hundred forty".