78285746527 has 4 divisors (see below), whose sum is σ = 78902169856. Its totient is φ = 77669323200.

The previous prime is 78285746479. The next prime is 78285746533. The reversal of 78285746527 is 72564758287.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78285746527 - 2²³ = 78277357919 is a prime.

It is a super-2 number, since 2×78285746527² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78285746557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308211474 + ... + 308211727.

It is an arithmetic number, because the mean of its divisors is an integer number (19725542464).

Almost surely, 2^78285746527 is an apocalyptic number.

78285746527 is a deficient number, since it is larger than the sum of its proper divisors (616423329).

78285746527 is a wasteful number, since it uses less digits than its factorization.

78285746527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616423328.

The product of its digits is 52684800, while the sum is 61.

The spelling of 78285746527 in words is "seventy-eight billion, two hundred eighty-five million, seven hundred forty-six thousand, five hundred twenty-seven".