78146811 has 12 divisors (see below), whose sum is σ = 113052888. Its totient is φ = 52017504.

The previous prime is 78146797. The next prime is 78146813. The reversal of 78146811 is 11864187.

It is not a de Polignac number, because 78146811 - 2⁷ = 78146683 is a prime.

It is a super-2 number, since 2×78146811² = 12213848138939442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78146813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210 + ... + 12503.

It is an arithmetic number, because the mean of its divisors is an integer number (9421074).

Almost surely, 2^78146811 is an apocalyptic number.

78146811 is a deficient number, since it is larger than the sum of its proper divisors (34906077).

78146811 is a wasteful number, since it uses less digits than its factorization.

78146811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13402 (or 13399 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 78146811 is about 8840.0684952098. The cubic root of 78146811 is about 427.5337656720.

The spelling of 78146811 in words is "seventy-eight million, one hundred forty-six thousand, eight hundred eleven".