78411521512144 has 10 divisors (see below), whose sum is σ = 151922322929810. Its totient is φ = 39205760756064.

The previous prime is 78411521512117. The next prime is 78411521512153. The reversal of 78411521512144 is 44121512511487.

It can be written as a sum of positive squares in only one way, i.e., 42114752409744 + 36296769102400 = 6489588^2 + 6024680^2 .

It is a super-2 number, since 2×78411521512144² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78411521512094 and 78411521512103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2450360047239 + ... + 2450360047270.

It is an arithmetic number, because the mean of its divisors is an integer number (15192232292981).

Almost surely, 2^{78411521512144} is an apocalyptic number.

It is an amenable number.

78411521512144 is a deficient number, since it is larger than the sum of its proper divisors (73510801417666).

78411521512144 is a wasteful number, since it uses less digits than its factorization.

78411521512144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4900720094517 (or 4900720094511 counting only the distinct ones).

The product of its digits is 358400, while the sum is 46.

The spelling of 78411521512144 in words is "seventy-eight trillion, four hundred eleven billion, five hundred twenty-one million, five hundred twelve thousand, one hundred forty-four".