5721144097778 has 4 divisors (see below), whose sum is σ = 8581716146670. Its totient is φ = 2860572048888.

The previous prime is 5721144097759. The next prime is 5721144097783. The reversal of 5721144097778 is 8777904411275.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4467207734929 + 1253936362849 = 2113577^2 + 1119793^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 5721144097778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1430286024443 + ... + 1430286024446.

Almost surely, 2^{5721144097778} is an apocalyptic number.

5721144097778 is a deficient number, since it is larger than the sum of its proper divisors (2860572048892).

5721144097778 is a wasteful number, since it uses less digits than its factorization.

5721144097778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860572048891.

The product of its (nonzero) digits is 27659520, while the sum is 62.

The spelling of 5721144097778 in words is "five trillion, seven hundred twenty-one billion, one hundred forty-four million, ninety-seven thousand, seven hundred seventy-eight".