78249424553 has 16 divisors (see below), whose sum is σ = 80259618816. Its totient is φ = 76265346960.

The previous prime is 78249424529. The next prime is 78249424567. The reversal of 78249424553 is 35542494287.

It is a cyclic number.

It is not a de Polignac number, because 78249424553 - 2⁶ = 78249424489 is a prime.

It is a super-2 number, since 2×78249424553² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78249424495 and 78249424504.

It is not an unprimeable number, because it can be changed into a prime (78249424523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8904800 + ... + 8913582.

It is an arithmetic number, because the mean of its divisors is an integer number (5016226176).

Almost surely, 2^78249424553 is an apocalyptic number.

It is an amenable number.

78249424553 is a deficient number, since it is larger than the sum of its proper divisors (2010194263).

78249424553 is a wasteful number, since it uses less digits than its factorization.

78249424553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10244.

The product of its digits is 9676800, while the sum is 53.

The spelling of 78249424553 in words is "seventy-eight billion, two hundred forty-nine million, four hundred twenty-four thousand, five hundred fifty-three".