78825825567 has 8 divisors (see below), whose sum is σ = 116779000880. Its totient is φ = 52550550360.

The previous prime is 78825825557. The next prime is 78825825571. The reversal of 78825825567 is 76552852887.

It is a happy number.

78825825567 is a `hidden beast` number, since 78 + 8 + 2 + 5 + 8 + 2 + 556 + 7 = 666.

It is not a de Polignac number, because 78825825567 - 2⁷ = 78825825439 is a prime.

It is a super-2 number, since 2×78825825567² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78825825557) 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, 1459737484 + ... + 1459737537.

It is an arithmetic number, because the mean of its divisors is an integer number (14597375110).

Almost surely, 2^78825825567 is an apocalyptic number.

78825825567 is a deficient number, since it is larger than the sum of its proper divisors (37953175313).

78825825567 is a wasteful number, since it uses less digits than its factorization.

78825825567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919475030 (or 2919475024 counting only the distinct ones).

The product of its digits is 75264000, while the sum is 63.

The spelling of 78825825567 in words is "seventy-eight billion, eight hundred twenty-five million, eight hundred twenty-five thousand, five hundred sixty-seven".