78141493444 has 81 divisors (see below), whose sum is σ = 163383721389. Its totient is φ = 32605312320.

The previous prime is 78141493399. The next prime is 78141493459. The reversal of 78141493444 is 44439414187.

The square root of 78141493444 is 279538.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3765295044 + 74376198400 = 61362^2 + 272720^2 .

It is a super-2 number, since 2×78141493444² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 160454569 + ... + 160455055.

Almost surely, 2^78141493444 is an apocalyptic number.

78141493444 is the 279538-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78141493444

78141493444 is an abundant number, since it is smaller than the sum of its proper divisors (85242227945).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78141493444 is an equidigital number, since it uses as much as digits as its factorization.

78141493444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074 (or 537 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 49.

Multiplying 78141493444 by its sum of digits (49), we get a square (3828933178756 = 1956766²).

78141493444 divided by its sum of digits (49) gives a square (1594724356 = 39934²).

The spelling of 78141493444 in words is "seventy-eight billion, one hundred forty-one million, four hundred ninety-three thousand, four hundred forty-four".