78124455801 has 24 divisors (see below), whose sum is σ = 134636252640. Its totient is φ = 44642545416.

The previous prime is 78124455793. The next prime is 78124455839. The reversal of 78124455801 is 10855442187.

78124455801 is a `hidden beast` number, since 7 + 8 + 1 + 24 + 45 + 580 + 1 = 666.

It is not a de Polignac number, because 78124455801 - 2³ = 78124455793 is a prime.

It is a super-2 number, since 2×78124455801² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78124455001) 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 23 ways as a sum of consecutive naturals, for example, 29524171 + ... + 29526816.

It is an arithmetic number, because the mean of its divisors is an integer number (5609843860).

Almost surely, 2^78124455801 is an apocalyptic number.

It is an amenable number.

78124455801 is a deficient number, since it is larger than the sum of its proper divisors (56511796839).

78124455801 is a wasteful number, since it uses less digits than its factorization.

78124455801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59051010 (or 59050997 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

Adding to 78124455801 its reverse (10855442187), we get a palindrome (88979897988).

The spelling of 78124455801 in words is "seventy-eight billion, one hundred twenty-four million, four hundred fifty-five thousand, eight hundred one".