78126771 has 16 divisors (see below), whose sum is σ = 107039520. Its totient is φ = 50657280.

The previous prime is 78126761. The next prime is 78126773. The reversal of 78126771 is 17762187.

It is not a de Polignac number, because 78126771 - 2⁶ = 78126707 is a prime.

It is a super-2 number, since 2×78126771² = 12207584693772882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78126773) 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 15 ways as a sum of consecutive naturals, for example, 49531 + ... + 51083.

It is an arithmetic number, because the mean of its divisors is an integer number (6689970).

Almost surely, 2^78126771 is an apocalyptic number.

78126771 is a deficient number, since it is larger than the sum of its proper divisors (28912749).

78126771 is a wasteful number, since it uses less digits than its factorization.

78126771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006.

The product of its digits is 32928, while the sum is 39.

The square root of 78126771 is about 8838.9349471529. The cubic root of 78126771 is about 427.4972169033.

The spelling of 78126771 in words is "seventy-eight million, one hundred twenty-six thousand, seven hundred seventy-one".