77734845220028 has 48 divisors (see below), whose sum is σ = 140279401113600. Its totient is φ = 37674759096000.

The previous prime is 77734845220009. The next prime is 77734845220037. The reversal of 77734845220028 is 82002254843777.

It is a super-2 number, since 2×77734845220028² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11225726 + ... + 16777562.

It is an arithmetic number, because the mean of its divisors is an integer number (2922487523200).

Almost surely, 2^{77734845220028} is an apocalyptic number.

It is an amenable number.

77734845220028 is a deficient number, since it is larger than the sum of its proper divisors (62544555893572).

77734845220028 is a wasteful number, since it uses less digits than its factorization.

77734845220028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552730 (or 5552728 counting only the distinct ones).

The product of its (nonzero) digits is 42147840, while the sum is 59.

The spelling of 77734845220028 in words is "seventy-seven trillion, seven hundred thirty-four billion, eight hundred forty-five million, two hundred twenty thousand, twenty-eight".