77825428543228 has 24 divisors (see below), whose sum is σ = 138142988210304. Its totient is φ = 38359937694000.

The previous prime is 77825428543183. The next prime is 77825428543229. The reversal of 77825428543228 is 82234582452877.

It is a happy number.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77825428543229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491714950 + ... + 491873197.

It is an arithmetic number, because the mean of its divisors is an integer number (5755957842096).

Almost surely, 2^{77825428543228} is an apocalyptic number.

It is an amenable number.

77825428543228 is a deficient number, since it is larger than the sum of its proper divisors (60317559667076).

77825428543228 is a wasteful number, since it uses less digits than its factorization.

77825428543228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983588433 (or 983588431 counting only the distinct ones).

The product of its digits is 481689600, while the sum is 67.

The spelling of 77825428543228 in words is "seventy-seven trillion, eight hundred twenty-five billion, four hundred twenty-eight million, five hundred forty-three thousand, two hundred twenty-eight".