78242512252401 has 16 divisors (see below), whose sum is σ = 132474094819200. Its totient is φ = 44710007001264.

The previous prime is 78242512252391. The next prime is 78242512252409. The reversal of 78242512252401 is 10425221524287.

78242512252401 is a `hidden beast` number, since 7 + 8 + 2 + 42 + 512 + 2 + 52 + 40 + 1 = 666.

It is not a de Polignac number, because 78242512252401 - 2⁹ = 78242512251889 is a prime.

It is a super-2 number, since 2×78242512252401² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78242512252409) 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, 206990772966 + ... + 206990773343.

It is an arithmetic number, because the mean of its divisors is an integer number (8279630926200).

Almost surely, 2^{78242512252401} is an apocalyptic number.

It is an amenable number.

78242512252401 is a deficient number, since it is larger than the sum of its proper divisors (54231582566799).

78242512252401 is a wasteful number, since it uses less digits than its factorization.

78242512252401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413981546325 (or 413981546319 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 45.

Adding to 78242512252401 its reverse (10425221524287), we get a palindrome (88667733776688).

The spelling of 78242512252401 in words is "seventy-eight trillion, two hundred forty-two billion, five hundred twelve million, two hundred fifty-two thousand, four hundred one".