78001724493 has 96 divisors (see below), whose sum is σ = 148144389120. Its totient is φ = 39833026560.

The previous prime is 78001724477. The next prime is 78001724497. The reversal of 78001724493 is 39442710087.

It is not a de Polignac number, because 78001724493 - 2⁴ = 78001724477 is a prime.

It is a super-2 number, since 2×78001724493² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78001724497) 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 95 ways as a sum of consecutive naturals, for example, 1068621 + ... + 1139277.

It is an arithmetic number, because the mean of its divisors is an integer number (1543170720).

Almost surely, 2^78001724493 is an apocalyptic number.

It is an amenable number.

78001724493 is a deficient number, since it is larger than the sum of its proper divisors (70142664627).

78001724493 is a wasteful number, since it uses less digits than its factorization.

78001724493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70749 (or 70737 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 78001724493 in words is "seventy-eight billion, one million, seven hundred twenty-four thousand, four hundred ninety-three".