78480511 has 4 divisors (see below), whose sum is σ = 78620472. Its totient is φ = 78340552.

The previous prime is 78480509. The next prime is 78480527. The reversal of 78480511 is 11508487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11508487 = 23 ⋅500369.

It is a cyclic number.

It is not a de Polignac number, because 78480511 - 2¹ = 78480509 is a prime.

It is a super-2 number, since 2×78480511² = 12318381213642242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78480911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69136 + ... + 70261.

It is an arithmetic number, because the mean of its divisors is an integer number (19655118).

Almost surely, 2^78480511 is an apocalyptic number.

78480511 is a deficient number, since it is larger than the sum of its proper divisors (139961).

78480511 is a wasteful number, since it uses less digits than its factorization.

78480511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139960.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 78480511 is about 8858.9226771657. The cubic root of 78480511 is about 428.1414485023.

Adding to 78480511 its reverse (11508487), we get a palindrome (89988998).

The spelling of 78480511 in words is "seventy-eight million, four hundred eighty thousand, five hundred eleven".