78242512252444 has 48 divisors (see below), whose sum is σ = 145144619329248. Its totient is φ = 36777898579968.

The previous prime is 78242512252409. The next prime is 78242512252517. The reversal of 78242512252444 is 44425221524287.

It is a super-2 number, since 2×78242512252444² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78242512252391 and 78242512252400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412026622 + ... + 412216474.

It is an arithmetic number, because the mean of its divisors is an integer number (3023846236026).

Almost surely, 2^{78242512252444} is an apocalyptic number.

It is an amenable number.

78242512252444 is a deficient number, since it is larger than the sum of its proper divisors (66902107076804).

78242512252444 is a wasteful number, since it uses less digits than its factorization.

78242512252444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196774 (or 196772 counting only the distinct ones).

The product of its digits is 11468800, while the sum is 52.

The spelling of 78242512252444 in words is "seventy-eight trillion, two hundred forty-two billion, five hundred twelve million, two hundred fifty-two thousand, four hundred forty-four".