78126550 has 12 divisors (see below), whose sum is σ = 145315476. Its totient is φ = 31250600.

The previous prime is 78126539. The next prime is 78126557. The reversal of 78126550 is 5562187.

It is a super-2 number, since 2×78126550² = 12207515629805000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78126557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 781216 + ... + 781315.

It is an arithmetic number, because the mean of its divisors is an integer number (12109623).

Almost surely, 2^78126550 is an apocalyptic number.

78126550 is a deficient number, since it is larger than the sum of its proper divisors (67188926).

78126550 is a wasteful number, since it uses less digits than its factorization.

78126550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562543 (or 1562538 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 78126550 is about 8838.9224456378. The cubic root of 78126550 is about 427.4968138107.

The spelling of 78126550 in words is "seventy-eight million, one hundred twenty-six thousand, five hundred fifty".