78144133 has 16 divisors (see below), whose sum is σ = 83327616. Its totient is φ = 73131520.

The previous prime is 78144119. The next prime is 78144139. The reversal of 78144133 is 33144187.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78144133 is a prime.

It is a super-2 number, since 2×78144133² = 12213011044643378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78144095 and 78144104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78144139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277953 + ... + 278233.

It is an arithmetic number, because the mean of its divisors is an integer number (5207976).

Almost surely, 2^78144133 is an apocalyptic number.

It is an amenable number.

78144133 is a deficient number, since it is larger than the sum of its proper divisors (5183483).

78144133 is a wasteful number, since it uses less digits than its factorization.

78144133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524.

The product of its digits is 8064, while the sum is 31.

The square root of 78144133 is about 8839.9170244975. The cubic root of 78144133 is about 427.5288819218.

The spelling of 78144133 in words is "seventy-eight million, one hundred forty-four thousand, one hundred thirty-three".